taking my money without consent 3/4 months now

EXTREMELY UPSET. I HAVE NEVER EXPERIENCED SUCH TERRIBLE SERVICE. NOT HELPFULL AT ALL - I have been calling since February to change my overdue contract phone to prepaid. First they \could not"because i still had data on my phone. I told the consultant i don't care about the airtime or data i just want to stop the account. SECOND time i called the consultant could not assist NOR forward my request to a manager or supervisor. Third time i contacted call centre I was promised that they will look into the matter. FOURTH TIME I WAS ASSURED THAT THE NUMBER WOULD BE CHANGED FROM CONTRACT TO PREPAID. *** and ***(REFUND) . NOTHING HAS BEEN DONE AND MTN IS JUST TAKING MY MONEY FROM MY ACCOUNT. <br> <br> This is unacceptable and i consider this theft. <br> <br> CHANGE MY NUMBER TO PREPAID and pay my money back please."""