If you have been unsuccessful with your 3D Secure check while using the FREE NOW app we would recommend you to ask your bank/card provider what are the necessary steps in order to use your credit/debit card for online payments and how to activate and use 3D Secure.
If your payment failed for another reason that is not related to 3D Secure issues, we would recommend you to ask your bank/card provider if there are any restrictions on your card or any other reasons as to why the payment was failing at the time you went to use the FREE NOW app.