Hello friends,
I am passing a problem very similar to YOBIT. Since November 2016 we have not been able to upgrade our currency Martexcoin (MXT) recently paid a 0.2 BTC upgrade and they only enabled the coin deposit and are blocking withdrawals altogether. We believe that the page has a false balance and has already sold all currencies out of their exchange. The other details are at this link. I would ask for support from the entire community to help us solve the problem.
https://bitcointalk.org/index.php?topic=2201484.new#new