Unauthorized debit orders after cancellation of service

Vodacom and extending contracts after you have declined to numerous sales agents and also called to explicitly cancel. I am now getting a debit order for a service I cancelled before my initial contract lapsed. I even called last month after I was wrongfully debited. How bad can your service be? So what we have to say does not even matter? You cannot not decide that I need a contract that I have declined multiple times.I honestly have received such bad service in the 24 months of the contract and continue to do so because I made the mistake of entering into one in the first place .If this not resolved I'm reporting the issue to the ombudsman and will continue to reverse debit orders. I do not need the data contract anymore!!!