Since it isn’t happening to you personally I guess it would be hard to back up with evidence but is there not somewhere you could anonymously report these abuses and concerns to? Any government department? At the very least the misrepresented conditions seem like they must be a violation of something . If it’s anonymous hopefully you’d be shielded and you don’t personal face the same risks to your well being. If there’s anything that is actionable it could result in better conditions all round.

Your tip might be a piece of information that they can add to any other such information to trigger an investigation maybe. Here in Australia at least, the government does at least sometimes act on abusive labour practices, they’ve swooped in on farmers employing fruit pickers who are almost entirely foreign and who suffered absolutely blatant wage theft and abuse and other high profile instances such as foreign embassy staff being treated as slaves.