Refuse to give me my profits

I opened an account with AMMarkets platform and deposited money for trading. Because of the upward trend of the market, I held a full position of long stocks, and all my profits were profitting. However, the platform said I violated trading rules because I did not have any losses. Since May 4th, I have been applying for a withdrawal and have not received any response. On May 31st, the platform asked me to sign an imparity clause, which stated that I would give up 30% of my profits. Due to pressure from my bank and payment platform, I was only able to retrieve part of my money to address my current difficulties. The remaining $10,532 was not given to me, and the platform requested that my CRM be closed. This platform is extremely greedy and unethical. They are stealing my hard-earned money. Here is the imparity clause that the platform provided:
"Please submit a $4,515 USD withdrawal request through the CRM backend and send an email to cs@ammarkets.com with the following content: 'I, XXX, acknowledge that I have obtained profits through illegal trading methods at AM MARKETS, and I agree to accept the vendor's proposal. The withdrawal will be processed after the principal has been withdrawn, and a 30% profit ($4,515 USD) will be released. After the withdrawal is successful, the CRM backend will be closed and the MT account will be closed." This platform is extremely unethical and should be judged by all. Please help me retrieve my money and restore my faith in trading platforms. I promise to assume all legal responsibility if any of my statements are false.