Brokerage firm fraud is the focus of our lawfirm. You can read more about us at investorlawyers.com. Please feel free to reach out to me at (800) 259-9010 or sedwards@sseklaw.com.
You will want to also include in your search attorneys who represent investors in FINRA arbitration, as you are likely subject to an arbitration clause if you dealt with a licensed brokerage firm. I would suggest using the search function on this website, or visit www.piaba.org to find an attorney near you who handles this type of work.
Most claims are predicated on two theories - that the firm or broker misrepresented the risk of an investment to you, or the investments (or investment strategy) was not suitable for you considering your age, risk tolerance, net worth, investment objectives, etc. There are other potential claims that you could make, although it's difficult to tell with the limited information provided so far.
I would be happy to answer further questions as well.