Useless Staff & bad service

I went to Ned bank pavilion on the 26 October 2015 to close my account. I seen to by a FAIS accredited consultant who assisted in closing the account. She told me I had a small balance, which I told her I will settle immediately. She wrote up a deposit slip for an amount of R15 or so and said I must go to the tellers and pay and assured me that the account will be immediately closed thereafter. I go to the tellers pay the account. I LEFT HAPPY thinking my account will be closed. To DATE I receive ALMOST daily SMSES that the account is overdrawn??? WHY is the account NOT CLOSED??? WHAT must a person do to get an account closed?? HOW many trips must a person make to CLOSE 1 ACCOUNT?? please may I have answers. How many times must I pay???