Bad Service

Trying to sort out my DSTV account since Friday. Got a sms saying I owe DSTV an amount of RR857.16 with refnr ***0. I called in and spoke to a lady at the call centre who told me my old decoder was linked to my account in error and she will remove it from my account. This should fix the problem. I got another sms on Monday saying now I owe R373.72 with refnr ***0. I called in again and was told the lady I spoke to on Friday deactivate my whole DSTV account and now my DSTV was disconnected. Everytime I call in I am told it will be sorted out. My account is still not active and now I see there is still an amount outstanding of R158.65. This is really frustrating having to deal with someone different every time being promised the issue will be sorted. I feel like cancelling the contract as this is not my error why am I struggling like this to sort out a simple issue.