Ordering Supplies. Monday – Friday, 8 am to 6 pm, Central Time. (800) 646-4633 option 2 (Toll free) Pump and Continuous Glucose Monitors Sales. Monday – Friday, 8 am to 6 pm, Central Time. (800) 646-4633 option 3 (Toll free) Billing, Payment, and Returns. Monday – Friday, 8 am to 6 pm, Central Time..