Usually exchanges send you a mail and give a window for withdrawal of the tokens before they close up for good. If you didn't do that time try contacting via Twitter or customer care if it's still available .
Thank you for the advice, twitter is shut down and also customer care, but there may be other options so appreciate you sharing the advice
It's been a year and obviously most of there staff and social media/email are already inactive now. There website was already for sale so it means that you have zero chance to contact any person from exchange. You should move on and stop chasing them because they already gone for good. Take this as a lesson learned for leaving funds on exchange.
The OP this topic should lock this thread long time ago and be responsible for leaving a thread that already answered.