What customer care????

I have asked for a premature cancellation from vodacom. On the 12th I paid the quoted amount and emailed and faxed the proof of payment as per instructions. The end of October I paid my last debit, as they explained me. On the 13th of November, I received an invoice for the end of November, I contacted Vodacom and they advised me, that I needed to call after I paid the settlement. They advised that they requested for the cancellation now. I contacted them a week later. and still my account was active, the agent advised again that they will cancel it. Contacted Vodacom today, my account is still active. How many times must I cancel. It seems that they just want to ***** your money, even after you follow all there requirements, they still do not care.