Get a lawyer and report to the police or crime investigation team in your country. If you follow such a process, there is still a chance that you may not get the lost funds back.
So an attorney would have the knowledge and skill to trace that transaction and be able to get the name and address of the scammer?
Trading the coin is the work of chain analytic companies. You can try and trace it yourself to a centralized exchange with a tool. But if the person do not send it to a centralized exchange, consider the money gone.