Coastal Financial services - coastal - CFS scam

1-866-224-1626 called my son with an automated recording saying there is a formal complaint against me and to contact them about my whereabouts. I called them and they told me I had applied for a payday loan online and didn't pay it back and to avoid going to court I needed to pay $500.00. They told me debt collection was over and they couldn't give me the company's name, or date of the transaction for the debt. The scary part is they knew my name by my phone number, my old address, old email address, where I worked when I lived at that address, the last 4 digits of my social security number and the name of a bank I used back then and that I had close that account. The time frame they are referring to is 6-11 years ago in Reno, Nv.  I have no collection on my credit report. When I asked about their company address and company name they only gave me Coastal as the name and said they couldn’t give an address due to security but said they were located in Charleston North Carolina. I have done some research online and have seen other complaining of similar situations with this phone number.