The problem is there was Iran in the country list when I signed up and there was no problem for me for more than 5 months.
Now without any announcement, they've decided to disable our accounts and ban our IPs.
I had the same problem with Poloniex but they did let me withdraw my money. Poloniex doesn't have Iran in its country list unlike Bittrex but they were very helpful.
They just have to let us withdraw our money or it's theft.