Unhappy Customer experience!

I'd like Auto and General to please explain why debit orders go off on the 24th of the month when a different date was agreed to in the contract. My debit order went off on the 24th November when I agreed to the 28th of each month. I have now incurred extra bank charges on my account which you don't pay for. I have also received an sms this month stating that you "will attempt to debit order the money earlier ". I have never ever given permission for my debit orders to go off earlier than agreed in my contract. How dare you people do this to customers.

Please fix this and refund the charges to my account.