Vodacom Refusing to refund my money

Good Day <br> <br> I am fed up with vodacom, i have called numerous times regarding a refund that needs to be processed and vodacom keeps promising that they will resolve the matter but nothing is being done. In the month of october, my vodacom contract had ended and i was requested to make a payment of 767.04, a day later i made the payment after i received an SMS requesting for payment. A few weeks later vodacom runs a debit order on my account without my permission resulting in a double payment being made. i called the contact centre and was told that i needed to e mail the proof of payment,which i had done and later received no feedback at all. i called vodacom 2 weeks later and spoke to Sibongile Mngopia, she told me that there are no notes reflecting on the system, i gave her a reference number of i*** and the line manager who was responsible for my query, Patricia Jack. She consulted with Patricia, who told her that the query was not processed and could not give me a reason why when i asked, to date i have not received any response from vodacom, please assist with resolving this matter.<br> <br> Your response would be highly appreciated.<br> <br> Kind Regards