Try choosing that you have technical problems and then "other". Type your problem there and you should get a refund.
They will ask your key, some questions and a screenshot. I've had this a couple of times and got my refunds.
in 3 steps
Choose the game that interests you and play itfor free.
Every game has some quests for which you will receive Soul Gems.
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
You know that on Gamehag you can get real rewards for free, right? Join us, complete walkthrough and get your chest!
So I've got dupe key from giveaway. According to Misty "Giveaway codes are promotional in nature. There is little risk of a duplicate. Try your luck in the next giveaway."
This is radiculous. Promotion supposed to promote services/products. This is technically not a promotion, because I've got prize in exchange for follows and retweets