Same thing happened to me. I tried Mastercard 5 times in 2 days. It gave me the same message as you. I then did a Visa credit card (not a debit card) and it worked perfectly. I had sent an email yesterday that was answered by Caroline. She suggested ...
I tried to activate my sim card and after chosing a phone number and a plan, then reviewing the order I tried to pay with a Mastercard. Screen said my card was not recognized and to call my CC company. I thought I had made an error entering data so I...