Hello,
A staff member has replied to your question:
Please purchase this game as a gift. Select the option "Store the gift in my inventory to send later".
Please indicate when you have done so, and upon confirming your purchase on the account, I will cancel and refund your order for the original accidental purchase.
To redeem this gift after the refund:
-Go to the 'Community' tab in the Steam client.
-Click the 'Inventory' tab in the right hand column beneath your persona. You should now see your current inventory.
-Select the Steam tab. This will open the games/gifts that are currently in your Steam inventory.
-Select the game that you would like to redeem onto your account. There should now be an 'Unpack Gift' button under the game's deion.
-Click 'Unpack Gift' to add the game to your Steam account. Once added the game cannot be removed from your account.
Please note that if you originally purchased an item at a sale price and the sale has now ended, we cannot extend the previously discounted price for these items.
This offer will only be valid for the next 15 days.
부탁드려요 ㅠㅠ