Trustaff review: Did not receive pay for hours I worked/was contracted

I am owed money for hours worked and no one at the company will contact me. I have sent many emails and made phone calls to the "supervisor" David James who is in charge of payroll. He will no longer take call or answer emails about the money I am owed because I have reported them to the DoL.
David James actually sent me an email regarding my shorted hours and I have copy of it and all the email exchanges I have had with him.
They have a history of doing this to people. I have found so many complaints about the company on various online forums.
They were shorting a fellow coworker his pay. His name is Mike Frey and he said they do this to him all the time.
I was not provided the correct timesheets upon start of my assignment. And before I left my assignment I was on my 4th version of a timesheet because no one at trustaff knew what was required by the company that does their payroll Aya