MTN DON'T WANT TO CANCEL MY CONTRACT

Yet again MTN has not converted my number to prepaid as requested on reference numbers ***5, ***1. My last email to [Email Removed] and [Email Removed] read \Hi, Please find attached payment of full outstanding amount and please change my account to prepaid my number ***. Please confirm that this has been done.\" Every person i get through to at MTN customer care is unable to assist why are they customer care?I have paid my total outstanding amount on the 26th February 2016 and requested to have my account converted to prepaid.i sent emails to customer care as well as cmc queries with this request and to date have no one has come back to me with confirmation that my accoun has been migrated to prepaid. Today I get an sms that my data and airtime has been topped up. Please reverse the data and airtime you topped my number up with today and cancel my contract with immediate effect as I can no longer afford to pay that amount on a contract any more. Please i have been asking since December 2015 to have this contract cancelled. PLEASE HELP MTN PLEASE HAVE MY CONTRACT CANCELLED AND MY NUMBER MIGRATED TO PREPAID. PLEASE TAKE BACK THE DATA AND AIRTIME."