Customer query

Telkom is failing to resolve my problem,I was in areas for only one month when they deduct from my account there was no enough money on that day they therefore change the deduction for th 15th without telling me,I was charged an additional R200 of which I did not know about I therefore paid the outstanding amount(ARREARS)they again deduct from my account I called and questioned that transaction,i did not find any answer and joy.The question is who is going to pay the bank charges and additional amount charged if debit never take off.