Their number is found when you Login, Click "Contact Us", Click "Call Us". I thought I'd answer the topic as I've solved the problem now: The payment will not process if your card is being denied (believing the charge to be suspicious or fraudulent). In this case, call the number on the back of your card to remove any blocks or holds and clarify attempted charges. On the other hand, the card may be getting denied because you are attempting to charge it over your credit card's limit. In this case, make sure you are not overcharging the card and have sufficient funds or credit to cover the charge. If you are waiting on credit card payments to be made to free up some credit funds, you may need to wait 1-2 business days as the card clears the payments and lowers the totals of your charges until you can charge the available amount (and not overcharge).
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