Bad Service

I have 2 cell phone contracts with Telkom and it get debited from my account on the 25th each month. This month for the first time it went off on the 24th. Due to no funds in my account I got charged a reversal fee. I phoned CUSTOMER CARE 180 explaining the situation. They asked me to pay it in manually I went to ABSA to pay the the que was extremely long due to month end, I had to do this during my lunch time. I do not use Internet banking. And I kindly asked if they can't debit my account twice the next month. The consultant who helped me let me wait so long to tell me it can't be done I have to pay it. I told her why must I run around for a mistake they made. I signed a lawful contract for Telkom to debit my account on the 25th not the 24th. Her reply was her manager Simpiwe said I must pay. I refuse to run around for a mistake not made by me. What type of service is this? And the cherry on the cake was no one apologised. Now I have to pay Telkom and the reversal fee at the bank, and it make my bank statement look bad. This never happened in the past. Why now? And why is management so unprofessional and unhelpful? Is this how you treat your customers?