I win game but i dont have this on my steam account

you will get key of it or the giveaway creator will add you and give you key or gift and you gonna activate it on steam

Then why did you mark it as received? Wait for the giveaway creator to contact you and give you a game, then mark it as received.

O no ! My sister mark it as received but i don t have it on my account

This guy say he send it but i dont have that anywhere

what i must do

add the guy who created giveaway if he willnt give you game wait and some times later mark as not recived

thank you cryalone and if he dont give me this game?

ok I know this but if he don send me that i check my email for steam,gift and just cause and nothing

wait for 7 days.. if he still hasn't given you the game after contacting him then mark it as not received. There's nothing else anyone can do about it.

Check your personal e-mail box again. Probably it was defined as a junk mail.

no i check spam and i have nothing i have him in friends and my inventory is empty to

The gifter has 7 days to contact you to give you your win. Please be patient.