A valuable resource is the Martindale-Hubbel Law Directory, which you can find in the law library of your County Courthouse, or if there is a law school nearby, in its law library. Sometimes public libraries also have it. It is organized by state, and within that, by cities. Find your city, and look for law firms engaged in business or commercial law. There may also be a category for consumer law.
There is also a very useful website called Lawyers.com that you may wish to consult.
In order to fight off a predatory loan company you will need to seek advice from a bankruptcy attorney. Most of them will provide you with a free consultation so that you can seek advice without having to file for bankruptcy. You can find some online that are located near you. Even if you don't file bankruptcy, they will be able to make further referrals if necessary.