Who do I contact for questions regarding payments if I financed through Citibank USA, NA?

Contact: 800-927-1948 (Hours: Monday-Friday 8am-5pm Local time from where the call originates)
Online: www.gateway.accountonline.com
Automated Status Line: Anytime

Payment Address:
Gateway Credit Program
P.O. Box 9025
Des Moines IA 50368-9025