It's been seven days after OP last login. Maybe he solved this problem and got his USDT or he just gave up trying to get his money back.
I've been using this exchange several times and I've more or less similar issues, like pending withdrawal and then I need to contact their live support. It's a painful experience and I'd rather not use this exchange anymore.
I decided not to risk my money and today withdrew my funds from this exchange to the last penny. Since I kept my investment there for a long time, I should have done it sooner. Now I'm calm!