Wages being messed up by employer.

Can somebody advise on issue I have with my employer. I moved from one department to another in Public Sector in July. I knew 6 weeks in advance that I would be moving so I advised my HR department as the would have to send on all of the details to my new department.

Since I moved my new department has messed up my wages even though they were advised 4-5 weeks in advance and they would have know anyway that the move was happening.

Basically what is happening I had a couple of deductions coming from my wages in my last department but they are still being deducted 12 weeks later even though my new department was instructed that the deductions should cease once I joined. I have spoken to the Salaries department and it seems to be one excuse or lie after another, they tried to blame my previous department for not sending the details on time, they have made excuses saying they do the wages every 2 weeks and it will be done next week, and now its because they are under staffed.

I brought the issue to my Union rep who said she spoke to them about it and she said there is nothing she or the union can do and I will have to be patient. I think after 12 weeks of being down over 100 euro a week it has become very frustrating.

Thank You