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.
unfortunately many exchanges seem that there is no one to give them legal advice or it seems that the exchanges are owners of the world and do not need less than 1000 clients because they can easily have that number of clients in just one week or less. In my opinion it was wrong to disable people's accounts without prior notice and without giving people the opportunity to withdraw their coins