If you are having issues where your payment has failed, or your card has been declined this could be for a number of reasons.
1: Is your card in date? An expired card will fail
2: Insufficient funds. Do you have enough funds in your account to cover your payment?
3: Is this the right card? Is the correct card set as default in your Inkpay account?
4: Have you passed 3D authentication? If the card is being blocked from making payments due to the 3D authentication step you will need to contact your bank.