Game

wait a week, report.

You wait one week then contact the support.

The submitter and winner(s) of the giveaway have seven days to complete the gifting process. This includes the activation of the gift on the Steam account of the winner. taken from FAQ

Wait a week, mark as not recieved, contact support.

Week passed and I clicked 'Not Received' in "view won". Is that enough?

What did you win anyways? :)

(might be useful to check out the giveaway ourselves)

Then thats GG.
:)