whocallsme.co...aspx

I'm being conned. Can reddit help me chase down a scam collections company? I had a credit card from 10 years ago, it got charged off. Last November a company called wanting me to settle the debt. They had a website, were listed as a legitimate business, I paid them and then they went under. I found out later that I had been scammed. It cost me around $800. What tipped me off, was that I'm now being called by the RS Group, or whoever this is, about paying off the same debt. I thought, how the f#$@ can I owe on this still? I did some research and found out I'd been scammed. So these guys are calling often, leaving messages at work etc. I told them that I got scammed last year and what they are doing is identical to what happened to me last year. I asked if they could verify that they were a legitimate business and they said they were listed with the Secretary of State. That SOUNDED legitimate. They said they didn't need a website to be a business. Yesterday I spoke with them again (after getting a message saying I was being served with legal documents) to try to find out more. I was told that they could still settle with me and gave me a very good deal on my debt. I explained that they didn't seem legitimate and that I needed some documentation by mail. They said 'sure' but that they weren't going to wait the three days for the mail to come to keep the settlement offer. I'm not sure what to do. I obviously wanted to settle the debt, but now don't know if these folks are legitimate. They did send one email confirming the debt, but it looked pretty fishy. All that was included was: Good Day, Attached you will find a notice concerning your personal business. The notice has all the information you will need to remedy the issue at hand. Respectfully, R.S. Group Admin. Dept. (888) 772-9116 toll free (909) 256-5500 Corporate office (909) 256-5556 fax The letter head read: 9668 Milliken Ave Ste. 104239 Rancho Cucamonga CA 91730 Phone: 909-256-5500 Fax