The Poloniex exchange in December of last year obliged all users to pass verification. And it seems that today its deadline. Many users have frozen accounts. Some users complain incorrectly display the number of coins in the wallet. The service desk, of course, is silent.
Have you managed to withdraw money or something was given to the new owners of the exchange?

https://cointelegraph.com/news/poloniex-crypto-exchange-users-claim-accounts-frozen-after-id-policy-update