I made a comment on this giveaway so you would get the message.

You need to mark the giveaway https://www.steamgifts.com/giveaway/uFXlF/catch-a-falling-star as not received.

You won't be able to mark it not received until 7 days after the giveaway ends. You need to remove the received status as I indicated above. Once 7 days have passed, you can click the not received button.

You did not get a key that matches the game you won. Only mark a game received when you get the game that matches the one you won.

https://www.steamgifts.com/about/faq

What should I do If I win a game that cannot be activated in my region, or if I receive a gift or key that does not match the game I won?
You should contact the giveaway creator to return the gift, and to inform them of the situation. If the giveaway creator is able to provide you with a replacement gift or key for the same game that can be activated in your region, then you should mark the gift as "Received". In all other cases, the gift should be marked as "Not Received". When marking a gift as "Not Received" it's recommended that you leave an explanation in the giveaway comments as a reference for both the giveaway creator and our support team. If the giveaway creator is not able to provide a replacement gift or key, they may ask your permission to delete the giveaway.