Move to prepaid from contract.

Have returned to branch 3 times since cancelling contract and moving to prepaid in Jan 2016. Keep getting notices about amount owing, branch checked my account in Feb all paid up. MTN keeps taking amount from my bank account and I have to go in and reverse it. 1st person at branch told me to ignore the notice, 2nd person said he had sent an email to sort things out and that my account was fine, 3rd person also sent email requesting they sort it out. I have again received notice to pay and threat of suspension of service.<br> It seems that the people who deal with this are faceless and nameless even to employees within the branch.<br> Time and money wasted in trying to sort this out as you usually wait for about 30 mins to speak to someone in the store then it takes another 30 mins to check things out and send the faceless nameless ones an email. ???