Which currency are you trying to withdraw? In my experience HitBtc had been one of the quickest and safe site to make transactions on.
Most probably your currencies wallet is under maintenance or the blockchain is under some upgrade.

I've just recently withdraw some funds from hitbtc and there has been no problem whatsoever. Make sure to confirm the widthrawal confirmation on your email.
The only thing I encounter on hitbtc is that it's sometimes hard to login and sometimes it asks me twice to input authentication code to access my account.

It's always like that in HitBTC most of the altcoins. It's irritating. I suggest you to stay away from that cheap support exchange. Look for a better exchange like IDEX and Binance as well as Huobi. There's always a compromise in HitBTC withdrawal.


And the worst part of that, most of the altcoins need 2weeks or more to resume withdrawal function.