FNB Does not want to close account and keep on charging service fees

I phoned FNB late January or early February . I paid my credit card in full. I then asked the operator to close the acount. I do not want it anymore.I was led to beleive the acount was closed. Today I got an SMS that my acount was overdue by R350. I phoned FNB Again and I was transfered 4 times and on the 4th attempt I droped the phone as I was being transfered the 5th time.

I am not going to pay the R350 rand. I asked FNB to close the account and I am not going to go into a branch to close it. I am not going to use my private time or take time of work to close this account in a branch as I was already assured it was closed.

Please do not Patronise me with a coment, that you are sorry and that you will get in contact with me, Just phone me and say " hi there, I am phoning you to close your account"

Simple ?