they called me and threatened that I owed them money.  I hung up and called them back to ask who the company is... they gave me the name and then hung up.

called on my 800 work number again... i called them back to tell them I'm the wrong person again....
dirtbags.

(720) 452-2338
Keeps calling no message left and when I do answer they hang up. So straight to voicemail it goes!

I get several calls a day from this number and others with the same recording. The person they are looking for does not live here!

Aggressive fraud, poses as debt collector. Told ME my social security number, demanding payment for a credit card I've never had. Became extremely hostile when I told him I'd never had a Discover card.

Have placed their number on block, but they started calling from a new number. All calls have used a recorded message which asks for you to call back a toll free number. When I put the first number on block (a Colorado Springs, CO area code), they called back 2 days later with a Denver area code. Both calls used different toll free call back numbers. I only called them back the first time because it made no sense, the guy gave his name as Randy W. and the company as Halsted Financial Services.

Caller ID: showed "HSF" both times
From 720-452-2338 with return call to 866-744-5641.
From 719-355-8988 with return call to 888-841-7048.

Be careful. These guys had my social security number and a married name I haven't used in nearly 10 years, who knows what else they have or use