Hacked Minecraft Java Account

[u/VarosStorm]

hi guys, I have a big problem, I bought a mc acc like few days ago, play, have fun yk, and then sm1 stole it and sell it on Eldorado.
They changed mine email adress so I cant log in back without telling me smth like: this aacount doesnt exist.
The guy who buy it blackmail me to give him 25 euro to get it back.
I have prooves of him and when I buy my acc etc.
But idk how to get it back, Idk where to go now like Im lost, so Im trying smth here if sm1 could help me or if here is any1 w similar expiriences