Formal platform, you can complain on the platform of the State Administration of Supervision. For example, you can go to the British regulatory authorities to complain about the British platform. If you don't know how to complain to the supervision bureau, you can also ask them for help in foreign exchange 1 10. If it is informal, I suggest two places. First: complain on foreign exchange 1 10 and expose him. Second: If economic disputes are involved, you can go to the police station. I hope it helps you.