Please cancel my DSTV services

I have had DSTV for more than 20 years without any interruptions or issues until this past Friday when I received a call from Multichoice for an upgrade on my old decoder. There was nothing wrong with my decoders or service so I was not interested but when I was told that it was at no cost or change to my subscription I accepted the offer of a new Explora Ultra. The Ultra was installed and worked well until Desmond called to improve my service further. Next thing I had no service on my secondary decoder. I called in and that was resolved by some linking issue but I later found that the PVR function was not working. I had to call back and the agent was unable to resolve it and I was told that the decoder is faulty and needed to be brought in for a replacement. I had no issues and was actually very happy with my services, until now. I do not want to have anything to do with DSTV anymore