Unable to withdraw

I was induced to deposit 50,000 in xiaotu168 at the end of November. They told me that I could trust their teacher with my account. I could withdraw funds if I profit after a week. And I should give 20% of he profit to their teacher. And I could get 500,000 profit in a week. So I should give the teacher over 100,000. And I was asked to pay the teacher the money first. I said I didn’t have enough money. After the negotiation, they said I could give half of the money first. So I gave them 54,614. After that, they said the superior didn’t agree so I have to pay all the money. I realized that I was cheated.