The most common reasons for declined payments are insufficient funds, entering the wrong card details (PIN, expiry date or CVV), exceeding your monthly spending limit for the card, or disabling certain types of transactions in your card security settings.
It may also be that sometimes, our system flags some online card payments to safeguard you. For you to both unblock your card and be able to process that payment, go to your email and you should have an email notification from us. Just click on the "Yes, it's ok" button and the next time over, you should be able to process the payment.
The error for the card payment should be shown in your transactions list. You should also head to the Cards tab, click on the relevant card and check the settings you have enabled. If you don’t have access, please speak to your account admin.