Hello dogapp.

This giveaway is over three years old. The giveaway creator has quite clearly decided not to take any action about it, so we would suggest you simply mark the giveaway as "Not Received."

From our FAQ:

When should I mark a gift I won as "Received" or "Not Received"?

• You should only mark a gift as "Received" when you have both (i) received the exact game described in the giveaway, and (ii) activated that game on the Steam account you used during registration. In all other instances you should mark the gift as "Not Received" one week after the giveaway has ended.