These people got your info from using a fake payday loan site or as they call it a rogue site.
These scammers buy and sell your info and each one who buys it trys to get your money saying you owe for a payday loan or a check that didnt clear.
The best way to get this all cleared out on whether you owe them or
not is to tell them to send the original debt in question to your address via the postal mail service.
If they say they can't or do not have to then they are scammers because it is not within the law not to send you proof of the debt.
If they are scammers then report them to the FBI, FTA your state Attorney Generals office.
In my opinion these people are terrorists and extortionists. They are terrorizing you to pay them on a debt you do not owe.
You may owe on a payday loan but the "real" loan company should be contacting you.