Insta Cash Laura Daniels Threatened legal action if I didn't pay them for a loan I never received Not supplied to me, Internet

I got a call from a female with MidEast accent, broken English, said her name was Laura Daniels from Insta Cash and that I owed money for a loan I never paid back.  I told her I had never had a loan with "Insta Cash" & asked her for a callback number because I needed to "check things out" and she gave me the number, 818-584-7330.  I knew it was a scam because I got the same type call about a month ago.

I told her I could barely understand her so she put a guy on the phone with the same accent, named Alex Young.  I could barely understand him & had him spell most of what he was saying.  In a nutshell, he said he was a lawyer for "Insta Cash" and that I would be served with legal papers tomorrow if I didn't pay him $800 for a loan that I never paid back.  I asked him for specifics about the loan, but he couldn't answer.  I asked him to give me his number and the number for "Insta Cash" because I wanted to call them, then call him back.  He gave me the same number for both he and "Insta Cash", except that to speak to him directly, to ask for extension 2348. 

I then filed my ripoff report. Last time this happened, the call came from a different number and the caller, with the same type accent, said that he worked for the federal govt in the "Dept of Investigations" dept. and they wanted me to fax a notarized letter with my checkcard info on it, authorizing them to deduct money from my bank account or I would be arrested, etc.  I told them what I thought of them, then never heard from them again.  Is there anyone out there that can make this stop???