ABSA RIDICULOUS BANK CHARGES

I had a savings ACC initially which I was quite happy with then I was practically forced to change to a Cheque ACC now when I was doing an unauthorized R100 debit order reversal and now I had R2000 debited into my ACC and it’s all gone because of bank charges and my admin fee is R750!? How is this even possible, I’m closing my ACC tomorrow and moving to a different bank. This is ridiculous. I’m a new single mom trying to take care of my new born, I don’t need this added stress!