Did a little research on this matter. Check out the FBI website, "www.fbi.gov/scams-safety/e-scams." Scroll down to "Telephone Collection Scam Related to Delinquent Pay Day Loans." The site gives information on many types of scams and where a complaint can be filed.
Note: Two fake posts has been removed from this thread. Somebody from India claimed to be Judge Robert J Bryan, U.S. District Court and Chief Judge Marsha J. Pechman.