DEBIT WRONG DATE

MFC JUST DEBITED MY ACCOUNT TODAY!. BUT OUR AGREEMENT IS THE 25TH OF EVERY MONTH BUT THIS MONTH THEY JUST DECIDED TO DEBIT ON THE 22ND AND WHEN YOU CALL THEM YOU GET NO HELP! AND THEY CANT EVEN EXPLAIN THEMSELVES , WHO IS GOING TO PAY FOR THAT UNSUCCESSFUL DEBIT ORDER!