Yes it works. I'm not American and today Bittrex solved my ticket after 4 days from contacting the Better Business Bureau

In the BBB website they say Bittrex blocked the accounts to comply with US regulations and then was flooded by support tickets. My problem was unrelated since I have enanched verification but still it was one month they didn't solve it (money stuck in reserved status). 4 days ago I saw Princess' post about the BBB and tried my luck, and I'm glad I did!

Thank you, thank you, thank you!