Scaming group deceive people's investment via line

My bank account was frozen yesterday. The bank said that there is circulation with that quantitative investment trading account. I have been deceived by millions. Their line group has teachers and assistants, and then they will call you to class. After the class, they say that quantitative trading is better than stock market or futures. Foreign exchange investment is much better, and then they use words to tell people to deposit money. When I want to withdraw money, I get a negative balance. However, the trader I followed did not lose any investment in the days when I wanted to get the money, and I did not cover any position after that. Also, there is no customer service reply to me.