VODACOM pathetic service

Vodacom is the worst network provider. I cancelled a contract with them in December but every month they continue to deduct money from my account. Every phone call I am told they need to listen to the recording of me cancelling the contract and being told the matter has been escalated and also I will be refunded, but when I follow up I am informed nothing has been done on the system with regards to the account. The call centre agents have not escalated the matter not even flagging it for the recording to be found of the cancellation and again another deduction takes place. This is how they get away with ****************. You cannot go in to one of their brances because cancellations takes place telephonically...pathetic poor service.