Vodacom canceled contract ossues

I have been struggling with Vodacom for the past 5 years. I had a router on contract with them, paid it up and canceled it. I received a statement showing this contract to be paid up and closed. The following month, Vodacom, without my consent reactivated the contract and billed me for it. It's been a back and forth with them over this and got so bad that MBD has gotten involved and I now have been blacklisted and my good name has been smeared. This is not just an embarrassment but a struggle to get my name cleared and Vodacom just sends me back and forth with absolutely no help and this situation is just getting worse.