The FBI and other LEA's already know who what and where they are. They will do nothing about any of this. After researching these guys several times over the last five years and turning then in to law enforcement over and over, I have come to the conclusion that they are in reality either the CIA or some other government agency or they are being used as a cover for same. Either that our they belong to a high ranking politician like Harry Reed, Nancy Pelosi, or Boorock Oderama himself!
Unfortunately the FBI doesn't seem to be interested in debt collection fraud, because it's too hard to prove a criminal case. The bogus debts are laundered through so many shell companies that no one can say where they originated. The collector probably has a good idea that the debts are fraudulent, but if challenged he can claim that he was duped by someone farther up the chain.
It's much easier to prove a civil case, and that could be prosecuted by the FTC, CPFB, or state attorney general. Since this "local office" case appears to involve caller ID fraud and illegally calling cell phones, the FCC has a stake in the matter as well. Unfortunately, again, all of these agencies are underfunded and it takes literally thousands of complaints before they do anything. The enforcement of the debt collection and telephone harassment laws has been left to private attorneys, so about all you can do is track down the perpetrator and file an individual lawsuit.
The really sad part is that some people are so desperate to rebuild their credit history that they will believe what some stranger tells them on the phone. Never mind that the call is coming from a spoofed number, or that a simple internet search on the company shows hundreds of complaints. As long as a few people are this naive, the rest of us will be dealing with these calls for a long time to come.
You get their mailing address and write them a letter, reporting them to the Better Business Bureau of their area and yours and to the Do Not Call Registry. Sometimes they just require a written notification. Usually this works. Good luck.