Vodacom not cancelling my contract!!

I have been trying to cancel my contract from the 25th of May and it is now the end of July. I have phoned numerous times and the person on the other side of the line either says that the cancellation is being processed(three times), there is no records of trying to cancel the contract(twice) or "your contract has been cancelled"(once). So I phoned again this morning because I see the debit order still went off. I now find out again (after being told that my contract has been cancelled) that no contract cancellation has been processed. This is truly unprofessional and now I am still getting charged. I really need this issue to be addressed and I am going to try once again.