You do realize that the payday loan places (who are all run by criminals) sold your information to other criminals so that they could extort you. Read CWG40's and Alfalfa's posts.
Received a call today from the same company. Contacted the BBB of Chicago and the not listed and the number 312-971-6237 does not show up as a business or anything in that matter.
The 7 year limit is for unpaid debts appearing on your credit report.
This does sound like scare tactics but that only means they have not yet filed, if they can file. Most old debt collectors prefer not to file since bad things can happen in court if the defendant contests the debt. The hardest part for buyers of old debt is proving a clean chain of custody giving them clear title to your debt and the right to collect.
Knowing you do have old debts, you will have to decide how to deal with the calls since what you reported so far has not reached the level of an FDCPA violation.
It may be, especially of you know you have no old debts. You can request a copy of your credit report from the three agencies to see if anything is present. However, old debts fall off the credit reports after 7 years so anything older then that would not show up even though the debt still exists. If you do decide to talk with them or call them back, demand written proof of any debt they claim you owe in the form of a Debt Validation Notice sent via US Mail, do not accept any other form of receiving the proof. You should also go to the FTC website and review the information for consumers there on dealing with debt.