It's rare for this to happen but if it does, we'll send an email out the day after your payment was due to ask you to pay through Manage My Booking. 

If you don't want to wait for the email you can pop on Manage My Booking and make the payment. You can be assured we won't take the payment twice.

If you're paying a failed payment with a different card from the one you booked your holiday with the system will update any future automatic payments to this card. 

Manage My Booking