You will need to speak to Steam to see if there is anything they can do. Bungie aren't the ones that control your license.
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Im waiting for Steam's reply too but do you think they will give my key back ? I dont know how that will work
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Haven't checked if anyone has had it work for them recently, but in pretty much all situations pre-2024 they'll tell you there is nothing they can do and to contact the seller to have them issue you a new key. The issue is that if you bought it through a third party (ie GMG) then GMG are unable to revoke the key themselves and as a result may not want to issue you another key on the chance you're just trying to get a free key.