All Gift Cards or eGift Cards hold an expiry date, which you can find detailed on your eGift Card. If you're unable to find this, or your gift card is physical, you can check your gift cards on your online account, using the online balance and expiry date checker in the My Account section.
If you don't use the value of the card within the valid time frame given, any remaining balance will be cancelled, and we aren't able to extend or re-activate cards beyond the advertised date.