Inducing to join group to buy securities on the grounds of refunding tuition fees

Inducing to join a group to buy securities on the grounds of refunding tuition fees, and keep asking you to deposit on the ground of inappropriate operation. In the end, you are not allowed to withdraw money and use the risk control as an excuse, and you have to remit money before you can withdraw cash. I just beg you to return my principal, I beg you