Another thing you can do is file a complaint with Colorado Department of Law Consumer Protection Section. It may be a long shot with the limited information you have but if they are worth anything they can investigate the phone number.
Colorado Department of Law
Consumer Protection Section
Consumer Credit Unit-Collection Agency Regulation
Ralph L. Carr Judicial Center
1300 Broadway, 6th Floor
Denver, CO 80203
Phone (720) 508-6012
Fax (720) 508-6033
E-Mail:
[email protected]