Family Dollar complaint: Gift Card Damaged, One Digit Caused An Error, Not Allowing The Code To Be Scanned.

Purchased the Gift Card, Sept, 16,2020@ 08:54 a.m. Grandson, got into my Vehicle,I drove off from the store down the road. Grandson, was trying to scan the Gift Card, only Error appears from the Card. Spoke to the Cashier, ask for the Supervisor, Cashier stated she wasn’t in the Store. Explain to the Cashier, that my Grandson just purchased this Gift Card, I was down the Road came right back, to make a exchange. She said that all Gift Card Sales are final. At the time I didn’t realize that, until I look at my receipt. When you purchased a product,and the damage is not caused by the Customer, it should be a even exchange. I am not asking for a refund, I am asking for an exchanged, for a Gift Card that works after I spend my $15.00 dollars. It may not seems like a lot of money to Family Dollars, but that ways my hard earned money, that I chose to go to Family Dollar to buy. All I want is just an EXCHANGES