Horrible experience at ABSA greenstone

I paid my ABSA credit card in full in February this year but didn't ask for them to close the account. I am currently working outside of the country and didn't realise there would be a bill of over R700 waiting for me just because I kept the account open. I received a call from ABSA while visiting South Africa enlightening me of this amount outstanding. I drove to ABSA greenstone to pay the account in full and CLOSE it as I don't see why you need to pay R100 per month JUST for having the account with them. So I stood in a very long queue and paid the outstanding amount, after which I was told to go stand in another long queue to see a consultant to close the account. Speaking to this consultant, explained to him what I want to do, he phones card division. I was then told that I need to pay ANOTHER R40 above the outstanding amount I DOUBLE CHECKED AT THE TELLER!!! I asked what this amount was for, but he couldn't answer me and rudely said he didn't know what is was for and that I had to stand in the VERY long teller queue AGAIN to pay the R40 and then come back to this queue to be helped again. This is where my patience wore thin. I refused to stand in a queue again and I refuse to pay for something I don't know what for. This is utterly ******* service on their behalf not to speak of *****! If they take R40 for no reason from every account holder where would they end???!