I was getting that shit from them for 5 days until I canceled my withdrawal and went for Doge and LTC. Withdraw those and sell somewhere else. Crypty s shit now.
This trick could be will work for OP. And also try to split withdraw into several amount.
If you hold 3.3 btc, try to withdraw with 0.5 btc and repeat it. If it's not working, buy some altcoin and sell into other exchange.