Some of my friends filed H1B through a Consulting company. They gave 1.5-2K USD each. All of the cases were rejected for some unknown reason. Now, that consulting company is not giving money back. Where should they file complain? The consulting company's mother company is listed in Bombay stock exchange.
If the company is in USA, you will file complaints with ICE and Wage and Hour Division of Department of Labor. If in India, I guess they will file a police complaint.