Pathetic service

I signed up for a contract over the phone on Vodacom. Within a week I returned the packages I opened. However I was billed for 2 months after cancelling the contract. When I contacted vodacom the said that they will credit my account into a vodacom account. However this is of no use since I don't have any other contract with them. I requested the money to paid into my personal account and since then vodacom has been giving me problems and stories every time I call them. This is has been going on for 3 months