I just logged in into my Binanace after seeing this and it seems everything is okay for me. Only few days ago I needed to do a trade and after that I withdraw it to my wallet without any hassle.
Did they do it very recently like today or yesterday?
Your currency on Binance are not your currency.
It's not only for Binance it's true for any exchange or service which do you give you access of the private key.
There is already a saying, "not your private key not your coin"