I'm sorry to hear that, and thanks for informing me.

Hi again. From what I can tell, the key shouldn't be region restricted, though if you want you can provide your region so I can double-check. However, the game itself is unavailable in certain regions, specifically Russia, so providing you with a replacement key wouldn't be possible.
In that case, as an alternative to marking the game as not received, you could give me your consent so that I can delete the giveaway, because support won't allow me to simply reroll a winner.