If you are unable to make a purchase it might be one of several reasons.
- Your card is not open for online and/or payments abroad.
Please see this article for help on how to open up your card for online and payments abroad.
(Help on opening up card for online payments)
You could also try with a different card.
- You have entered the card details wrong
Please make sure that you have entered all required information exactly as it says on the card
- Your card does not have enough funds/credit
Try another card.