Yes, you can request a refund for a Steam purchase made with a Steam Gift Card. However, the refunded amount will not go back to the original gift card. Instead, the funds will be credited to your Steam Wallet, where you can use them for future purchases on Steam.
If you don’t use the full balance of your Steam Gift Card, the remaining funds stay in your Steam Wallet. You can use this leftover balance for future purchases on Steam, such as games, downloadable content, or in-game items. The funds do not expire and will be available in your account until you spend them.
Yes, once you redeem a Steam Gift Card, the funds are added to your Steam Wallet. You can use your Steam Wallet balance to buy games, in-game items, downloadable content (DLC), and other products available on the Steam platform.