If you pay by credit card, your payment could be somehow denied at the checkout by our system in defense against possible credit card fraud.
It's a good idea to call your credit card company or bank ahead of time to let them know about the purchase so that it doesn't get declined.
Here are 3 solutions for you:
1. If you have a PayPal account, please try to pay by PayPal.
2. Please switch to your other credit/debit cards.
3. If you do not have a PayPal account, please select PayPal still at the checkout page & click the complete order button.
Then you'll be directed to a page with access to both PayPal and Debit/Credit card payment (for the latter option, you don't have to register for PayPal).