The refund guarantee option is available to add only at the time of purchasing your tickets and cannot be added at a later date
How can I use the refund guarantee.

Once purchased, refund guarantees, allow you to cancel your reservation with a full refund with a minimum of 24 hours advance notice from the time of the reservation. You will be able to reach out to our reservations team via call or email. The full ticket amount will be refunded to the same card used at the time of reserving. The refund guarantee amount is non-refundable.