Every time DOGE goes up in price, something like this happens. HitBTC has been considered untrustworthy for quite a while now; I also don't know how they manage to stay afloat & haven't gone bankrupt already (I guess just through sheer theft of coins).
After almost three years of doge withdrawals locked on this "exchange" I think we can say this is one of the longest ongoing scams in the crypto industry. Unfortunately I have many DOGE locked there because of greed as in the very day they locked the wallet there was a good arbitrage opportunity. Now the price is almost 1/10 of the real price and those doge are surely lost.
Yeah that's a bummer. They want you to sell your coins (that they don't have) while at the same time are attempting to trick others into depositing to take advantage of the supposed arbitrage opportunity, which doesn't really exist. Sucks.