Precum miway

On the 30th of November, Miway decided to jump the gun and debit my bank account early. The agreement is for all debits to go off on the 1st of each month. Now im being charged a late fee from my bank due to Miway not knowing what they are doing. Its not a lot but its the principle. I make sure that all my accounts are paid but Miway seem to feel that they can do as they feel.