I have tried multiple times to register a credit card for prepaid service and the screen always displays "Unable to Process Transaction - We are unable to verify your credit card information, so this transaction could not be completed. Your credit card has not been charged." I have tried different credit cards. I emailed customer support a week ago but no response. I also called into customer support last weekend, he entered in my credit card numbers but none of them worked (they are all Canadian cards). The support person submitted a ticket but I still haven't been able to register a credit card. I want to take advantage of the promotion for automatic top-ups. Please help.