The worst service ever

"Upgraded" to a 200mb fibre line in August of 2020. I in intially said no thanks but was told it was only a month to month contract and was on special. After filling in the application I was duly notified that my line was now being upgraded to a 200 mb line. After not seeing a difference after a week, I enquired about this. I was told that the lines were "equalised" later that same day. Still no change

After the first month my bill came in at R230 more than the agreed contract price. When I queried it I was told my query would be escalated. It is now 4 months later. When I phoned for the 14th time on December 17th I was told that yes the system does reflect as a 200 mb line but that the speed is regulated at 100 mb. When I asked to rather be downgraded to a 100mb line I was told I cannot as I had signed a 24 month contract! I SPECIFICALLY asked if it was a month to month contract and was told that it was. I also can apparently not be helped as I have lost count of the amount of times the supervisors would have gotten back to me. I have a reference number, but it seems that it means nothing. I am really at my wits' end and do not know what to do? Any help will be appreciated