Bad service at DSTV call centre

We bought a HD decoder. We phoned to set it up etc and the old decoder was never cancelled as requested. We were billed for the decoder we didn't use. Our service was cut off and I phoned and was promised it is sorted. About two weeks after that one of the accounts ladies phoned about and outstanding amount, I explained the issue and said she can listen to the call, she told me she needed a date, time and person I spoke to to resolves this. I phoned back and spoke to someone that would apparently sort it out and while on holiday I get a msg saying the service was cut. I phoned again and was told there is an amount of R1000 odd rand outstanding and was promised again that it would besorted, I paid an amount of R542 given by the consultant for I don't know what, and the next day I confirmed if all was up to date. Yesterday my service was cut again, and the consultant told me I MUST pay this amount and refused to take a ref number to check my previous correspondence. I phoned back AGAIN and was assured everything will be sorted. I hope it is has been now, but the competence of the call centre staff is shocking not even talking about bad attitudes and laziness to assist.