Annoyed, exhausted and drained customer

So Dstv suddenly billed me R1200 for a decoder that was ****** 5 years ago. I have been calling to get this rectified with no luck, I have called different consultants and they all come up with different reasons as to why they cannot help me, their famous statement is that they will be referring my query to the billing department which itself cannot be contacted. It's been days without service yet I paid. Every time I call I have to tell the story to a different guy all over again and this costs airtime money. I am honestly annoyed, how can it be so easy to wrongful charge someone and be so difficult to rectify your mistake.To Dstv, if you cannot reconnect my services due to your mistakes can you please refund my money. And please I will not be paying any reconnection for this mistake. Must say this is the worst service provide ever, really annoyed and the incompetence is shockingly on another level, why can't their calls be referenced so that I don't have to repeat my story to a different person all the time