Early debit order without warning

My debit orde le went off earlier without any warning. The debit order bounced and now my bank is charging me extra fees. My statement clearly stated that the debit order will go off on the 26th only. Customer services is not helpful at all, just says it’s in my contract. No one has money on the 24th. If there had been a warning or if it had mentioned on the statement it would have been possible to prepare and make a plan. Not impressed with their service.