But I transferred all my coin on whitebit exchange but unfortunately my all coins vained due to exchange delisting.
Didn't they sent you a notice that that coin will be delisted into their exchange? It's common for an exchange to give a notice to all of their users about the upcoming delisting with any token that they've chosen.
How much what was that during that time, the value in fiat that you've lost? Because AFAIK, even they delist it, you should still be allowed to withdraw it.