Getting in touch with a member - Trying to Resolve possible Mistake.

You did well but loose your hope on getting key and go on.

Have you tried contacting the creator via Steam or email?

Continue your attempt to contact the giveaway creator. After waiting 7 days past the giveaway's ending time, mark as not received and move on. Support can't help you any further.

I tried adding the person to my steam account, but they've not accepted.

I'll just click the 'not received' as soon as I can. It's a shame, but it happens.

Thanks for the input/feedback guys!

You could also try commenting on the giveaway, since he might notice the notification from it.

Took your suggestion and added a comment, I'll see if anything comes from it, thanks for the tip.

Why did you create a ticket ? I don't see how support can help you with this
If you can't contact him, maybe he will after you mark it as not received

Because I thought that was the purpose of 'Support' tickets? I've seen various issues on this site, via giveaways, seen the comments in the forums. By letting the right people know, if something needed to be done, it could, if it didn't need to be done it didn't. If support has a lot of tickets about the same person/id it may give a 'red flag' if not, so be it. I was just trying to help the community.

Was I doing wrong?

@ TempeteJoachim - I've just gone into my ticket, I can't find anyway to close it out or add a note to it or nothing.

@RowdyOne - I didn't need to email him, as LuckyLastLaugh idea worked, the guy come back to me, he'd updated the key in the giveaway, I've just tried that one, it worked, I've commented back to him, and will comment again to advise him I've ackknodledge/received it, but I still don't know how to close the open ticket.

Found the way to close it, deleted the original comments, and closed it out..

Thanks guys.

"Reply" button. It's a thing here.

I think I may have the same problem as you. It looks like a legit giveaway but they guy gave away so many of the same game in the last few days that I wouldn't be surprised if it was an honest mistake.