Standard Bank Asset and Vehicle Finance is pathetic

I called the Standard Bank Vehicle and Asset Finance Department last month to have my Debit order moved from the 16th to the 27th. I was assured that it would be changed by the agent who took my call. I was surprised to find out today that they've debited my account despite my request to have my Debit order moved to the 27th. I called the customer care number only to be told that the debit order cannot be reversed despite my request. How is a person suppose to meet their other commitments or survive for the remainder of the month even though I responsibly requested that the date be moved to meet the payment. I further requested to speak with the manager, which I didn't get a chance to do because no one seems to answer. This kind of service from Standard Bank is absolutely pathetic. It's time I move my banking to a bank that would value its clients. I need the payment to be reversed and for the debit to come out on the 27th of each month not the 16th. Please go through your recordings and check that I did make this request last month.