For technical assistance or billing questions, don't hesitate to contact support by filling out the support form. Kresser Institute customer service hours are 9 AM to 5 PM Eastern Time, Monday through Friday. We are closed on federal holidays. We strive for a same-day response to all emails that arrive before 1 PM Eastern. The majority of requests will be responded to within 24 hours. Support is not available on weekends. However, we do try to accommodate urgent weekend requests related to accessing your course content.