Worst service of my life

After a debit order failed end of Oct'21 we received an sms on the 4th Nov'21 stating we were in arrears of R677.99. We phoned the call center and asked that the debit order should be rescheduled for Monday 8 Nov'21. So we made sure we had enough money in the account to pay the outstanding R677.99. Again the debit order didn't go through so we made a manual payment of R700 when the app reflected that nothing was paid. End of Nov the normal debit order with a R70 debit order penalty went off our account which was fine until I received the new statement. WE WERE CHARGED AN ADDITIONAL R70 penalty for the second debit order that did not go through as they tried to deduct the outstanding + the current amount + penalty in one BEFORE the Nov invoice was due on the 26 Nov'21. Please can somebody explain to me how the hell that is okay?!?!?!?!?