ABSA Unfair Charges R400 On Exceeding With R8

I have a free business account with absa bank, in short I had made some immediate payment in june/july I did not keep track of it as I was under the impression the R7.50 per transaction charge would be taken of my balance immediately. So I had something like R20 in my account. Month end came and had no idea what the charges going to be and did not expect much as my statement only arrives on th 5th of the following month. I WERE CHARGED R100 for exceeding with R8, As months go by I transfer money to the account but well under R100 a month to keep the account positive but then this huge penalty arrives and put me in the negative witch incur another R100 and another I Lost R400 because of R8 exceeding. That is unfair ABSA this is a small little business. At least send me my statement before charging me or deduct bank charges after I have received my statement. HOW should I manage my finance without proper statement information, This is SAD it is that time of year every cent count. R400 is just unfair and coming at a bad time. Tried to resolve with ABE at the branch but with no regard.