If you were able to click on the pay button, it means that we have filled in all the necessary information.
The blocking is probably due to the authentication request from your bank, you are probably making a false manipulation with the code you received on your application or by SMS. You should contact your bank if you do not understand why the authentication does not work.
If the blocking occurs when you click on the "pay" button after entering your card numbers, it may be that the CVC has not been entered. This number must be indicated just to the right of the validity dates of your card.
If the problem persists, check that you have entered the correct card numbers.
If the problem persists, please send us a request via our contact form. Please attach screenshots, otherwise we cannot help you