Regarding your support ticket, if there is a problem with the key you receive on a giveaway, you should always leave a comment on the giveaway page to communicate with the giveaway creator:

https://www.steamgifts.com/giveaway/T1QPw/hentai-shooter-3d

If you do not get a working key within 7 days after the giveaway ends, you can mark it "Not Received"

Thank you