Contract cancelled but still receiving bills

After my 2 year contract with cell C ended I converted it to a month-to-month basis top-up contract and shortly after stopped the contract and went over to pre-paid. My reason for this was that they keep on messing up my bills and I got fed up with calling them every month and searching up all the records of payments I have made and bills they sent me.<br> <br> It is now about three months later and they still send me bills for a contract that I had but don't have anymore. I have to phone them every month to get them to reactive my line (which is on pre-paid). Everytime I phone them they confirm after assessing all the bills and payments (about and 30min to hour calls everytime) that all my previous contract bills have been settled and I don't own them any money. They also ask me everytime when my debit order date is on my contract and there isn't supposed to be a debit order as I previously used EFT and currently I'm on pre-paid (no contract).<br> <br> I ask that cell C will kindly get this sorted.<br> <br> I hope that everyone considering using Cell C will head this warning, Cell C has great prices and their reception is good enough but their admin makes their service not worth the saving.