I am completely sorry for your trapped Money but you should seek local authority help regarding the fraud. If there are plenty of evidences are available and money which you want to get back is pretty enough then why not take the chance for the same.
Cryptocurrencies are still not legal in many countries and losing or being scammed while investing in crypto will not receive legal protection.
In my country, cryptocurrencies are not banned outright but the government always informs everyone that, if you trade crypto, all your risk will not be supported by the government, you are solely responsible responsibility for your actions.
OP didn't mention how much he lost but the possibility of OP getting it back is very unlikely, it's a lesson for him and for all of us to stay away from weird exchanges like this.