Card orders can be amended or cancelled via your Order History if the order is still in 'Order Received' status. If your order is in 'Printing' status please contact customer service to inquire if an amendment can be made.
If you cancel your order after checkout via My Account, you will need to contact customer service for a refund to be processed.
If your order is in 'Sent' status it is no longer possible to make any changes.