Regular Hours:Should you wish to change the account number being charged, please contact Customer Service at (800) 682-3231 between the hours of 7:00am and 7:00pm CST (8:00am to 8:00pm EST) Monday through Friday and Saturday from 9:00am to 1:00pm CST (10:00am to 2:00pm EST), excluding holidays and a Customer Service Representative will be happy to assist you.