I need to return this key back to you. Please reroll

I understand your situation. Just to make sure, did not you redeem the key on the winners page yet?

Your key is still valid. I redeem this DLC from another steamgifts win and forgot to marked it as owned. So I got suspended for 4 days becauase of duplicate win, Thanks.

Thank you for your reply. I got it, I'll request new winner.

Pleasantly surprised to be winning a giveaway that ended two weeks ago, thank you!