Conflict Of Interest Fraud & Harrassment

I am an IT contract worker doing work for a public company that has $390 billion in assets. My employer is the staffing agency that has a relationship with the public company as a vendor, seems to me that the vendor has a lock-in with my project manager, which is against the company's ethical policy of conducting business (conflict of interest). I have been working there for 1 month, and questioned the staffing agency(acct mgr) on when I would get paid, he(acct mgr) told me that there is another 3rd party staffing agency(xyx co) which is going to pay me, find out that this 3rd party is my project manager LLC company which he runs on the side. Upon finding out and contacting the staff agency, the (acct mgr) contacted my project manager where I work at, then after I was quickly confronted (harrassed+coereced) in private by the project manager not to tell his boss or HR that he was profiting from me being employed there, since he decides on who gets hired, I read the company's policy and I don't want to part of someone else's conflict of interest. Plus I found out that the (acct mgr) resigned from the staffing agency as soon as I made a complaint or inquiry, I need serious help, the agency owes over 10k in compensation, my proj manager keeps telling me I would get paid, and that I will only be getting 2 weeks pay around my 2nd month. I am stressed out becuase I feel like I have been a victim of someone else scam, plus I owe taxes to the IRS and have bills to pay.