You can go to the industrial and commercial bureau to check his registration. If not, you can go to the industrial and commercial bureau and the public security bureau to sue them for fraud. Might as well go to the public security bureau.
If they register for overseas labor services again, you will spend money in vain. Get the people back at once, so as not to lose more. (selling girlfriends)
If you really want to do labor services, go to a regular company to do it.
Learn from mistakes.