damn, this sht is awful. this is obviously something that is morally wrong. and i truly believe that users of the said exchange like you should not be obligated to sell all of your possessions just because they want you to do so. did you read their terms and conditions before you started to use all their services? and if you did, was a statement regarding issues like this stated there? if none, then you can try to ask if they can extend the deadline since they haven't declared anything of the sort in their terms and conditions. sad to say, i really doubt that they'd even listen. but it's worth a try though.
and if that fails, then i'm afraid there really won't be anything much that you will be able to do about it then. this is mostly why i, and a lot of people do not want to store huge amounts of altcoins or bitcoins on an exchange. because anytime, things like this can happen. oh well, lesson learned. and i hope a lot will also learn from this too.

for what it's worth, i really hope that things work out in your favor and am really sorry that this had to happen to you.