Warning: people who promise to get your crypto back for a fee are almost always scammers. Check a recovery service

Exchanges

Who runs each exchange, where it is licensed, and how to contact it about stolen funds.

B

Binance
The largest crypto exchange by trading volume. It runs identity checks and has a dedicated channel for police requests.

O

OKX
A large global crypto exchange, formerly known as OKEx. It runs identity checks and accepts police requests.
I've been scammed: what to do first