You may cancel at any time. If you cancel within 90 days of your enrollment Effective Date, you will receive a refund of any program fees you may have been charged. To cancel, call (800) 815-4051 (9:00 a.m. to 10:00 p.m. Eastern Time, Monday through Friday and 9:00 a.m. to 6:00 p.m. Eastern Time, Saturday, except holidays) OR write to Payment Security, P.O. Box 740237, Atlanta, GA 30374-0237.