If you can't process your payment, please check that your card has sufficient funds on it. Check that you have input the correct details, particularly the CVC code (remember Amex requires a four-digit CVC).
If all details are correct and sufficient funds have been confirmed, try changing your browser and inputting your details again.
Your bank may block the transaction if they see it taking place outside the country in which you live – please notify them that it is a legitimate transaction.
If the issue persists, we recommend changing browser and trying again.
Another option is to try an alternative card, if you have one.
If you are still experiencing difficulties after following the aforementioned steps, please contact your bank and/or credit card provider.