Please assist with the problem stated bellow.

I had an account with Markham which was handed over to DMC and I paid it off last year October 29th and got a settlement letter for it. After a few months realising that it hasn't been removed from Transunion I then called DMC to assist me in removing it on the 27th January 2015. I heard nothing since then until I made another call on the 25th or 26th of February and a lady by the name of Esona was great help to me until I called in again for a follow up where I realised I had not been assisted accordingly. Of late when I call I have to throw a tantrum because I get thrown from agent to agent so I end up spending R150 per call. The latest conversation I had with an agent was that they would send my query through to TFG since they can't help me. It has been a rough four months because I had made payments towards my account and finished it yet I can't make any we credit because I have a bad record at ITC, it's as if I don't work any more. Please do assist in this regard and help me regain my life back.