ABSA's ridiculous charges on my check account

I have being a client of ABSA for many years. As of late I had some financial issues and from month to month I could not pay all all of my debtors but did make arrangement with the one or 2 I could not pay at the time. ABSA however see this as a big no no and are penalizing me with exuberant amounts. This month my account went from a positive balance to a negative R800 only on bank charges and that because 2 debit orders did not go through. Last month was the same thing and before that it also happened a couple of times. A while back I went to go and see an ABSA manager at their Derdepoort branch and a fixed monthly baking cost was promised. Why do I need to pay between R400 and R800 in bank charges every month? Because I an in financial difficulty ABSA is penalizing me? Every month they just take a larger portion of my salary. That is a lot of money to me but apparently if you do have money that is fine as will not charge you so much. That what you get for being loyal to just one bank.