different game key than I won

Mark as not received.

People looking at your account might think you did not activate said game so you should write support and mark as not received.

hacker evolution was a free game so the creator has made an fake GA.

mark as not received after the 7 days - contact creator and support - only time I have done it was when doing a lot of giveaways and I put wrong key in wrong giveaway :O( - but I sorted it later - this might not be the case with this, but just noting that it can happen

1. Ask GA creator for correct key
2. If not available, mark as not received.
3. Wrote comment inside GA that you agree to delete this GA
4. GA creator write to support for delete this GA.
   = game will be deleted and will not be counted as win on your account.

Either the creator has to provide a working key for the game or you can agree to deleting the giveaway. Just leave a comment in the gib and the creator will be able to request it via support ticket. Whatever you do, do not mark as received since that will put you at risk of being suspended.

yeah mark as not received and the creator for key of correct game, if they provide it then change it to received.

What HAKIMODO said: https://www.steamgifts.com/go/comment/TNwCs4J

According to the rules, all wins must be activated on the winner's account so if you receive a different game than the one that was stated in the giveaway, or if you cannot activate the gift and you mark it as "received" you risk a suspension.
Moreover users may blacklist you due to your unactivated wins.
So you have to mark it as "not received".

Since you received a game that has been removed from the giveaway list, you should report the creator.

Have a nice day.