Closing of account

Good day

I have been running around branches and calling fnb for abot a month now with regards to closing FNB Global USD account. I keep getting the response that i will be closed in a week but nothing seems to happen then i have to retry again. This is very unprofessional as they say there is funds in my account. there are no funds as my balance is 0.01 and i would really appreciate it if someone could assist me.