Contract Billing

I had 4 contract numbers with Vodacom, upon losing my employment, i contacted Vodacom to send me a quotation to cancel 3 of my contracts and make time prepaid, which Vodaom did. Within 3 days of receiving the quote, i made payment to Vodacom to have the contracts terminated. At the end of April I called to make sure tbis has been done as i had requested, the lady I spoke to confirmed that it has been. Since then Vodacom has been billing me for contracts that I paid to be cancelled. After making several calls to them, they eventually did but now they have debited my account to cancel those contracts while they have been paid for already. Last month I was also billed. When I call o am told they will credit my account, i don't want a credited account, i need my money back in my account as i am not employed and that's the only money I have. Since April I have been fighting this battle with Vodacom, it's September now.