Invest in COZFX which is a fraud platform. So I was cheated of 50,000. Unable to withdraw without paying 120,000 as margin

I knew a beauty named Xiaoyun via WeChat moments. SHe said she earned money by investing forex. Adn she said she can profit 100% for there was a professional teacher guiding us. I observed for a lpng time and I was attracted. I invested 50,000. When I withdrew funds, I have to deposit more money. They said I have to add over 40,000 because of the lose cause by my wrong operation. It didn't make sense. And I didn't have enough money to compensate. Then I searched on the net, I found there were so many people cheated just like me. Pls help me, tks so much!