deduct my principle because someone else made a profit?

I have been doing futures and spot hedging in Doo Prime before, and it has always been officially recognized by the government. Suddenly in August, it was said that the transaction was illegal, and no money was given. Later, the salesman gave information, saying that because there was a previous The client also made a profit, so my principal was covered, so the principal could not be released. isn't it? Others are making money, and your platform is not happy, so come to deduct my money? He also blocked me in the background without notice, that is, robbers do not give money! He also said that Doo Prime is a big platform. I can trust it. Now it has been dragging me for almost a month. I can't get a penny, 120,000 US dollars! My hard-earned money! who can do justice