REFUND LONG OVERDUE!!!

on 13 April 2015 I got a call from Vodacomdurban offering me a contract. Agents name Jairus. Which I excepted. The device was delivered to me I was not happy with the product so called the call centre to cancel contract. The device was picked up. But Vodacom was still debitting my bank account which I wasn't aware of. In October 2016 when I requested a bank statement that's when I discovered Vodacom was still debitting my account. I immediately called the call centre they have acknowledged I have canceled the contract within 7 days and receipt of the device. They agreed to refund the money! I spoke to Progress M****ko. I was asked to email my bank statement which I did. I call the call centre every week! It's gone 5 Months now still no REFUND!!!