I Created a giveaway,but the receiver of the game don't mark it as received...

You shouldn't call out. And if you already sent the game. don't reroll. contact support, and ask them to deal with it

Start by removing his details. No calling out here.
Then submit a ticket to support.

Don't call out users, try to contact him in Steam, if he does not answer nor mark it as received in 7 days after the giveaway has ended contact support with proof of having sent the game.

you should go to his house... and steal his eldest daughter's virginity.

No calling out. If you have an issue, contact SUPPORT.