I had an experienced of not getting my coins due to broken blockchain, it was delisted without any prior notice so I wasn't able to withdraw or trade it (
no other choice but to accept, move on and leave the exchange). If in your case there was a notice about delisting the coin, but the wallet is in maintenance status, you should have trade it instead (
too late now though).
I guess you haven't read their terms about delisting, I quoted it for you:
15. Currency Delisting
The currency delisting procedure will be performed by the exchange only with a prior announcement of at least 14 days before the actual delisting of the market. A notification by newsletter will be sent to all user e-mails (all users are subscribed to the newsletter by default), Twitter, Chat and on the main trading page ("Important News" section). Markets will also be highlighted with a red color to let users know that the market involving the currency is planned to be removed from the exchange. This gives users ample time to trade or withdraw currencies before they are delisted. Balances cannot be recovered after a coin is delisted. Wallets can be given an extended grace period for withdrawals if server performance is not affected. Coin can also be delisted without previous notice in case of broken blockchain which a coin developer is refusing to fix.