I worked with this exchange for three months. Today I couldn't log in — it shows an error message saying "Your account is at risk." Technical support informed me that my account has been permanently blocked, and I quote: "Your account may have been used maliciously for fraudulent, predatory, and misleading activities." I haven't engaged in anything illegal. There are over 4,000 USDT left on the exchange. They are not planning to return the money. Can you advise me on what to do in this situation?