I opened a ticket for a re-roll about 2 weeks ago and I didn't got any answer

Well, bit uncertain where you're having an issue, but just to recap the basic steps:
Check SteamDB for the price listings for the game and repost the giveaway with the correct regions filtered out.
If you're in the United States, for example, you'll always have to filter out any country using the Euro.
The region-restrictions you select on SG are the regions that are able to access the giveaway, not the ones that are filtered out from accessing it.
If you prefer a simpler solution, you can always just restrict to your own region and ones you're certain off-hand utilize the same or weaker currency than you.

Staff is fairly dead right now. Once the winner has posted their agreement to a deletion, you're in the clear on that giveaway posting.
I'd then move immediately on to posting a new giveaway with the correct restrictions, and bench that old one until staff can get around to deleting it.