As your query relates to an Arsenal FC gift card that was purchased instore, please contact the Arsenal FC Customer Service team directly.
You can visit their FAQ's help centre at https://arsenaldirect.arsenal.com/faq
Alternatively, you can check your gift card balance by clicking here https://arsenaldirect.arsenal.com/gift-card/balance
If you're unable to find the answer to your query, please contact their team on 0207 619 5000 Monday-Friday, 9:30am-5pm or by visiting https://arsenaldirect.arsenal.com/contactUs