You made the right choice to transfer your crypto from the exchange, that's what everyone should be doing, and about the bat coin i' m really sorry but it seems the coin was going to die sooner or later, even if the exchange was still there the project stopped developing meaning it was an abandoned project that's why it was only listed on that exchange, next time try doing some research before you opt-in  to buy any crypto, they are alot of abandoned projects out there, mind the way you buy, so there's nothing you can do at the moment other than to move on with your life, remember "if you focus on what you have lost you won't be able to see the opportunity that lies ahead"