Vodacom just dont care

I had a contract with vodacom. I settled this contract in full before the 2 year contract. I had to go to Vodacom Greenstone Mall to settle this contract in full. I gave them the settlement letter that i got from Vodacom, and settled the contract. Now i received statements and phone calls that Vodacom is owed money from me and that i have not paid them. I personally went to Greenstone Mall Vodacom 3x to give them the copy of the settlement letter, and amount payed again and again. Lindy and Thabo "helped" me. 1 st december 2017 i received a phone call AGAIN that i need to settle my account.

Vodacom was settled, BUT they NEVER canceled the contract. The money i payed, they used as if i payed my account in advance. I just don't know what to do any more. I was told to get the Ombits man involved. Will do home work to maybe go that way, Or maybe Vodacom will see me on hello peter.com, and sort this out.