Number not Migrated as requested

On the 12th of May 2015 I requested that my contract be migrated to prepaid. After noticing that I had been debited for the contract at the end of May, June and again in July, I went back to the MTN store on the 15th of August to find out what is going on. They once again sent through the cancellation documents and stated that this had been cancelled in May. Now, September 2015, the debit order has gone off again. <br> <br> I find this completely unacceptable. I would like the number to be migrated to prepaid as per my initial request and I would like the funds paid to be refunded into my bank account. <br> <br> Please contact me so that this issue can be resolved.<br> <br> Cell number to be migrated : ***<br> Account number : A*** <br> <br> Charles Pieters