COntinued billing 4 years after cancelling contrac

After 4 years of constant call centre calls/ complaints made I came to an Elroy Jacobs who advised me he would resolve my billing issues. He acknowledged that DSTV was incorrectly billing me and that I did in fact have credit which would be placed back into my account within 4 days. After my recent follow up - 4 days later - I then get told that there will still be more processes to go through to get my credit. They take all the interest benefit and then still tell me I can be LUCKY they have not INSTITUTED A INVESTIGATION INTO MY CLAIM?????<br> <br> Pathetic and disgusting - I cancelled these services 5 Sep 2011!!!