If you believe you are being harassed by a debt collection agency in Colorado, you should contact the Colorado Collection Agency Board. This agency handles complaints against collection agencies that are operating in violation of the Colorado Fair Debt Collection Practices Act.
You can contact Board here:
1525 Sherman Street, 7th Floor
Denver, CO 80203
Phone (licensing): (303) 866-5706
Phone (consumer complaints and information): (303) 866-5304
Fax: (303) 866-5691
E-mail: cab@state.co.us