What happens when one wins a giveaway but receives a false gift?

You wait a week, click Not Received and continue with life.

User will be banned I believe....
You wont get game.....
Fraudster will get butthurt.....
And I suggest u make one thread

Try to contact the giveaway creator and talk it out. He might have made a mistake. If not, you're out of luck and you'll want to mark it as not received after a week.

Mark it as not received and send a support request with proof.