Hello manyakulade

No one can reply in User Report category.
Let me quote the FAQ:

The winner has redeemed my gift, but not marked it "Received". How do I proceed?

• If your gift has been activated or redeemed by the winner, and they have not left feedback after one week, please create a support ticket to request received feedback. A support member will review your ticket, and if the gift is activated on the winner's Steam account, they will update the feedback to "Received".

You should submit a ticket in "Request Received Feedback" category and provide a screenshot of your gift history showing the winner accepted the game.