Cancelled Contract and Debit order still remains

We (myself and my husband)had a joint cell phone account with MTN and we have decided to cancel the contracts as our cell phones were in good conditions and did not need an upgrade.<br> <br> We called them in advance, wanting to know when we needed to cancel. Which we then did on the specific day they provided.<br> <br> Thinking that our contracts were now cancelled and the debit order should then have been stopped.<br> <br> To my misery this was not the case..<br> <br> Then we contacted them once again and the consultant (I found to be very unhelpful and extremely arrogant) apparently they cannot retrieve calls without a reference number, which I feel is extremely unacceptable..<br> <br> They are my service providers and I would think that if they entered my acc number or reference number into their system that they would be able to retrieve all relevant information they need...<br> <br> We then asked for a manager and apparently they were ALL BUSY, AND!!! Would give us a call back, which still has not happened!<br> <br> It is the second month now that the debit order has been deducted and there is nothing I can do about it as the bank cannot stop the debit order as MTN needs to do this!