Well my account issue was resolved

After 1 month waiting I didn't get any response to my 1st ticket and I created a new one.
I got the same answer about U.S OFAC sanction etc. I wasn't be lazy and checked myself at OFAC site. Of course I found NOTHING and re-open the ticket again. After several comments the ticket seems was escalated to the 3rd line of technical support and I got more adequatelly comment. At the same time I wrote at Bittrex telegram chat with the ask of resolving my issue.

So after two weeks of messsaging my account was re-activated. All funds are at their own place. Withdrawal works.

It looks like OFAC, US and other politic things had no relationship to the issue. It's just technical ! Just a lack of technical employee at Bittrex.