scam by a hongkong girl... name TINA

This girl's name is Tina and she lives in Hongko. I had a conversation online a few months ago. The girl asked me to be her student. Ask me to trade... He promised to make my profit by showing proof of his profit. So duxholding brokar e amr provides a demo and real account... I invest all my savings and profit... But now I can't withdraw money... Telling Tina that $850 will be paid before taxes and then my capital and profits will be returned to me...which is a fraud... Please help me withdraw my money. please