DSTV Unallocated Funds

I am very disappointed with Multichoice. I paid for someone their dstv account. After I had paid the person told me that dstv had disconnected their service. I called Multichoice and was told to send proof of payment to them. I sent my bank statement which showed the transaction and they said they don't accept bank statements as proof. I was told to contact my bank and get a receipt of the transaction and my bank said such transactions don't have receipts,a bank statement is good enough as proof. Multichoice has a finance department which can just search for the payment from their side and refund me my money but no they are giving a runaround even after I've sent the reference number of the transaction. I'm frustrated and want my money back. I' ve phoned, I've emailed and nothing is happening.