Incorrectly billed.

I am fed up. I am having an endless billing battle with DSTV from December 2021. I am being billed for a a service I am not in use of. I am sitting with 1 decoder I didn't opt for. I have asked for the transaction to be cancelled and for them to retrieve their decoders from my premises but as usual the matter is escalated and no one from dstv ever contacts you. My last call to them was on the 24 February 2022. I am being billed for extra view and I do not have access to the service.