Quick sign up, poor relationship maintenance

My experience opening up a business account was very disorganized and did not happen in one sitting. In fact, I arrived at the DOT center around 16.30 to open the account and the sales person told me to give him everything and he will open it because it was close to closing time (which is at 17:00 but was not an issue previously). Low and behold I had a business account when I logged into my account online - only thing he mentioned to me is to put money into the account to activate it. He did not explain to me how the fee structure works and to my knowledge pay as you earn means that you pay fees as money enters and leaves your account. I noticed that money was deducted from this account monthly. I logged a call online via premier banking on 5 October and received a courtesy call within 48hours but my problem was not resolved. My account is almost at -R300 just due to banking charges to which I never agreed to. The Customer contact center were unable to help me because they cant access the call because its in a different business unit. If they just explained to me how it works in October I would have closed the account then. Now, I am paying R180 extra because they did not help me