Op you can report the fraud case to the authorities ( Interpol in this case that is if they will be interested) but you won't have any luck recovering your money. Which I believe recovery of your coins is your primary goal. Imho if you keep chasing you are only going to lose more money in the process. Bitcoin refund scams are popular these days.
It was happening from 2015.One of my friend from Indonesia had loss over 9 bitcoin by some hackers.The value of bitcoin in 2015 was 10 percentage for now.But still the bitcoin was stolen by the hackers.He tried all the way to recover.It's failed at th end. Hackers always learn new technology over other people.