ive had a horrible year

Last year I interviewed for a teaching job in an etb centre that according to the description, I was fully qualified and experienced for, this was my dream job btw, the job i've been aiming for since I left college 10 years ago! Ive worked voluntarily in similar roles and worked for very little money in similar roles to gain experience and good references. I had a level 8 undergrad directly related to the job, a level 8 higher diploma specialising in another area related to the job and was half way through a masters degree directly related to a large component of the work so all my qualifications and experience are directly related to this role. The person previously in the role had retired, I know this person and know they have no qualifications but they would have started the job 15 or 20 years ago when no qualifications were required.

When I applied and interviewed for the job, the manager really liked me and decided they wanted me for the job but someone in HR who unfortunatly, the book falls with in terms of employing people, who has never met me & never spoke to me and has no clue about what my job would entail, decided that he did not want to employ me because I don't have a very specific masters qualification that isnt even needed for this role. (I dont want to give details on the job as I dont want to potentially risk identification) but this person in HR decided at this point that I wasnt qualified enough for the job. Because of this, I was under the impression I didnt get the job and I moved on with my life.

a few months later I was contacted by the manager, she was basically telling me that herself and the other manager who interviewed me had been fighting for me to get the job and they had good news, I was being offered the position. My initial thought was I cant take it, I was doing a very full on masters and thought I couldnt take on any more work as my current job was giving me flexibility and was only down the road from me. This new job was in Dublin and id have to travel over an hour by bus to get there and back. But my current job had no future and I was given the impression the new job would offer more money, the job was part time so would allow me to fit college around it, I had the promise of a future there, I would be doing what ive always wanted to do and I what ive been working towards, and although it would be more work and time in terms of travelling and earlier mornings/later home times, it would be worth it in the end as once id finished my masters I would be under way less pressure, I naively thought that hard work paid off 😂🤣

The more I thought about, the more I felt that I had to take it, I accepted and signed the contracts.

And the issues started to arise.

1. My job requires its own room or space to plan, prep, for storage and to take client groups, I was told previously that this space was available. When I started the job the first issue arose in that this space was not available, they told me there was something wrong with it and they were waiting for it to be fixed but was assured it would be fixed very soon, so I adapted myself to suit their situation trying to do my job the best I could without the basics of the requirements needed to do the job.
2. The job was paid monthly, the first month came and I didnt get paid. I contacted payroll who told me they hadnt been sent my details. I contacted HR who told me they had sent my details so I was going back and forth trying to figure out what the issue was. At this point I had money saved up for the two years of my masters just to cover the fees. Id already paid most of my first year fees by this stage so had just enough left to pay for second year. I had no other income so used my savings to get by while I was waiting to be paid in my job, thinking I will just replenish the savings when I get paid the following month, i had about 3500 in savings. The following pay day came and I still hadnt been paid. I again contacted payroll and HR but was fobbed off and told they didnt know why I wasnt paid. Month 3 I wasnt paid again and by now had gone through all my savings. I desperatly contacted payroll several times begging for my wages or even just some of my wages as I was struggling financially and getting into debt.
3. Eventually I was told the reason I was not being paid was because I wasnt garda vetted (I was) then they said they lost my garda vetting then said they needed me to do a new one, id already done this, they were waiting to receive it but withholding my wages from me until then.
4. Eventually they paid me after 3 months but I was put on emergency tax and was not given the full wages, they paid me in dribs and drabs over the next few months, some months I got as little as 800 euro so I couldnt save, pay off the debts id owed or replenish the savings id lost. Only for I was consistently assured I would be getting what was owed to me, I would have left the job but felt I was in too deep at this point as my savings were gone and I wouldnt get another job at short notice like that.
5. At the end of august I was sent an email stating that I was not considered qualified for the job and I would not recieve the full amount of pay and I would not get any holiday pay or any entitlments or rights and I would not be able to renew my contract for the following year. I was still being emergency taxed and could not get this sorted through revenue, as they kept sending the wrong forms to payroll or sending forms with missing or wrong information.
6. The managers fought for me, had a meeting with the CEO who signed off on my contract and assured me that I will be offered future contracts at the correct rate of pay. After this I received another letter saying that I was still deemed unqualified, on lower rate of pay and again, would not be entitled to future contracts. I then got a phone call from the manager telling me he was so sorry but the man in HR wont approve my contract because he thinks I should have another masters qualification that I actually dont even need for this job as its totally irrelevent to the position. Ive also had written confirmation from the jobs council that my qualifications are more than sufficient but this man has decided to dig his heels in and refused point blank to sign off my contract. So I stayed in this job through all the mess because I was told from the beginning it would work out as a life long secure job for me if I wanted it. As all of this was going on, the stress and financial difficulties were causing me issues with college, the lecturers are not compassionate or understanding whatsoever so instead of offering any support they forced me out and told me to come back next year to finish the course when I dont have so much going on. So I had to take a year out.
7. Ive still not had a proper wage as im still being emergency taxed 8 months after I started the job, ive been back and forth to revenue trying to have this sorted out. I think its finally been fixed but I dont get paid until the end of the month. If it has been fixed and im no longer being emergency taxed, this will be my first real proper wage since I started the job 8 months ago. Ive also finally been given my own room to plan and prep and work in. So things are starting to look up but cant help feeling this job derailed my whole life!!

I really needed to get that out, ive never actually wrote it all down before or gone through everything step by step so if you have read it, thank you! I suppose my question is more looking for advice really, where do I go from here? After all that and after all that sacrifice and hard work and getting my hopes up, its all lead to nothing!