Fibre speed issue

Hi

I've already been dealing with Vodafone on this but just wanted to see what some of the knowledgable folks here thought.

Upgraded to Fibre back in February. Was initially only getting about 1mb more than before (from 17 to 18) which I knew would be the case. After a couple of weeks noticed that the line was testing at 25mb so asked them to raise the speed which they did and everything worked flawlessly for 6 months after that (with 6mb upload).

About a month ago, noticed that my download speed had gone down to 20mb, then a couple of days later down again to 15mb. Got onto Vodafone through here to report the fault which was relatively useless to be honest.

Was contacted a couple of weeks ago by one of Vodafone's second level support techs who explained to me that there seemed to be a known issue with a number of customers whereby people who report a fault are deliberately throttled in order to try and figure out what the problem is but once the fault is fixed (which he said it was) are then left at the lower speed. He was investigating why this was and would get back to me.

Got a call today and he said that he'd heard back from Eir and the issue was that because there had been so many recent fibre connections in my exchange that now my line wasn't able to take the higher 6mb upload speed so the upload was reduced to 3mb and because the upload and download speeds are linked together, the download also had to be reduced (goes in 5mb increments) and basically there was nothing else that could be done. There was also no way of putting the download speed back up again by itself and leaving the download as it was.

He then mentioned that vectoring was being rolled out across the exchanges and eventually I may be able to achieve the speed that I was getting.

Another wrinkle in this is that shortly after I reported the fault, and Eir engineer did come out to the house and checked the main socket which was fine and said that my line was actually capable of taking up to 40mb.

Sorry for the length, but just wondering if what I've been told makes any kind of sense or am I being given the runaround?

I work in IT myself so I think I know when I'm being fobbed off which I don't think I am (the tech actually rang me the other day when he noticed that my broadband was down and was worried that there was another problem but the modem was just switched off as I was at work) but wouldn't mind a second opinion from here if possible.

Thanks.