Disappointed with Telkom such bad service

I have a contract with telkom and last year in October the was cable theft in the area I reported it to telkom and telkom told me they will not be replacing it as it's expensive and they are ending the ADSL package I was on they told me they will migrate me to LET and I will not be charged any cancelation fees as this was a migration and I was continuing with contract but to my seprise Telkom has been billing me on the old account every month that they told me they will close, but never did and they say am now in arrreas of 2300 I have been trying to call telkom for the past week now and every time I call I first get placed on hold then after 30 to 40 minutes I only get to speak to a consultant when I explain to them what happened they ask for my details which I supply and they put me on hold again until a 20 Minutes goes but and the call drops, no one ever calls me back but they have my details and they have went on to list me on ITC which has badly affected my credit rating please assist me Please cause telkom is failing me am very disappointed given that I have being with telkom for over 6 years now