wrong billing, bad service

I have paid my dstv account r105 on the 20 September through EFT, 2days later my account was disconnected saying that I owe r150 , which I called in and sent proof of payment and it was connected , and then 25th my connection was disconnect saying I didn't pay, I called the call center again and was told its a system error I don not owe then was connected, then today again th 05 October my connection is disconnected I must pay r86, then I called consultant Nokulunga tells me she wont reconnect me as I must pay and that she wont even take the ref number that I wanted to give her to show I have paid and sent proof of payment, then when I ask for Supervisor she refused what kind of service is this, someone can you sort out ur system and reconnect my dstv account as I don not owe you. im very disappointed in your service.