DSTV is a total circus, and you wonder why you are bleeding vustomers

I had streaming connected and a month later I purchased and Ultra decoder. I requested that DSTV switch from the steam package and connect the Ultra decoder to an existing dish which had last been used for DSTV about 20 years ago. We have an open view decoder connected to the dish and is working at 100% signal and quality. The person at the call centre activated the service to the Ultra decoder but this never worked. After spending no fewer than 4 wasted time calls to the call centre I eventually decided to return the Ultra decoder to Pick n Pay. During this period the streaming still functioned normally. A month later I received a bill for the use of the decoder.(which never worked due to the inefficiency of the staff at the call centre) Now I am receiving demanding SMS's demanding the outstanding amount for the use of the decoder. After so much correspondence to DSTV I eventually received a call from a customer care consultant to whom I explained the situation. She promised that all these charges would be reversed as she could see that the Ultra decoder could never have worked as the old twin LNB on the existing dish does not support for the operation of the Ultra decoder. She explained that all charges will be reversed. After all this I am now receiving regular threatening SMS's from DSTV that I urgently need to pay all outstanding amounts to avoid being blacklisted and avoid possible downgrading of my credit rating. What an idiotic company you are DSTV.