Please help, Thanks.

I have a friend's friend, who is a living nanny and undocumented from China. The employer (wife from China and hu*****and is white) treated her badly and not fairly. Not only that, they have not paid her for last four months. Now they want her to leave. Anyway, or anyplace, she could go and ask the fairness. I do not know this lady. When I heard the story from my friend, I just feel I should do something to help her. But do not how to help her.