Bridge of contract!!!!!!

My Debit date is for LAST WORKING DAY of thee month. I get paid, LAST WORKING DAY of the month!!! Its in your contract, its OUR agreement. WHY would you try and debit my account TODAY!!!!!!!!! Obviously there is not sufficient funds, as I get paid LAST WORKING DAY of the month. Please update you records properly and stick to the TERMS & CONDTIONS!!!!!!!!!!!!!!