For the best advice on how to stop Gift Cards from being used on your device please refer to your Pays provider’s FAQ’s:
For Apple users, if you lose your device and need to suspend or remove cards from Apple Pay click here
For Android users, visit find and secure a lost phone here
You can also delete your your Special Gift Card from the Apple Pay or Google Pay on your mobile device, and add it again following steps outlined here
You may also wish to perform these additional steps:
Go to your Apple ID account page or use Find My iPhone to suspend or permanently remove the ability to pay from that device with Apple Pay. On your Apple ID account page, sign in and click your device. In the information that appears, go to the Apple Pay section and click either Remove or Remove all. Your card or cards will be suspended or removed from Apple Pay, even if your device is offline and not connected to a cellular or Wi-Fi network.
If you require additional assistance you can visit: