Unresolved vodacom contract cancelation

I am not a person who likes to complain but I am really not happy with vodacom and really don't know what I must do anymore to get this matter resolved. I made a cancelation last year in June 2020 of a contract that ended with vodacom, but they still continued to debit my account until now. I have called vodacom cancelations several times I even lost count how many times I have been calling. All the consultants I have spoken to have been telling me they are escalating the matter and will call me back to give feedback and that never happens, comes the next month I get debited. Everytime I call cancelations I get a different consultant and I'm told the same thing over and over everytime that they escalating the matter, but nothing is being done nd I am still debited every month. I really don't understand why is it so difficult for vodacom to cancel this contract and it is really frustrating and draining to call vodacom cancelations several times and still the problem doesn't get resolved. I even went to the nearest vodacom store, they couldn't really do much for me there but could only put me on the phone with vodacom cancelations and still now the problem is not resolved.