Vodacom refusing to cancel my contract

The only reason that this review has one star is beacause it does not allow me to write a review without a star, Vodacoms lack of service deserves no stars . I have been trying to cancel a contract with them since August 2019 and I still have this unwanted contract. They are completely ignoring my 6 requests to date of cancellation. Out of desperation i have cancelled my debit order but now still racking up as outstanding. I got rid of thw simcard after the first cancellation request so I am being charged every month for a service I dont use and do not want!!!!!!! That in my eyes is *****ing. Going into the store also gives no joy as they just tell me to phone the cancellation number. I need this resolved and the unwanted amounts reversed from my account.