The staff operated my account in the background and caused a loss

The staff of WistonFX platform began to call me in September 2018 to entice me to open an account and operate foreign exchange on the platform.He said that if he didn't understand it, he could make a profit, and then he induced me to put in RMB 280,000 for several times in the whole process. Because I was busy with my work and had no time to operate during the day, the staff of the other party's platform secretly operated my account in the background and placed orders for me, resulting in my loss.When I asked them, they told me that they could trust them to make a guaranteed profit.As for their behavior of financing on behalf of customers and automating client disappearances, it is a serious fraud. Please help me contact the other party's platform and give me a reasonable explanation.