Probably there are some reason why they blocked you like literally. Wherein maybe they caught you cheating or you are using  vpn because that is the common problem in some exchange even before especially if crypto were banned in your country  .. And its ben long time? Well if  i were you just don't give up and always try to reach the support if  you realy have money on it. Look for some site also such telegram twitter and etc .so that they can see your message immediately.