I just got the same people, They would give me no info about where I took out a loan from , but did threatin to throw me in jail. I told them the same thing (good luck). Who do I repo

I don't write checks. I don't get pay-day loans. I don't have outstanding debt with anyone, anywhere.
Doesn't matter to this guy - threatening calls that they're going to have the sheriff come arrest me. Good luck with that. You can't demand that I get arrested for anything. There has to be a hearing to show cause, which I would have to be notified of, in writing, from the court.
If you get calls from this person, ask them to send you documented proof. Do not give them any information. No SSN, address, date of birth, anything. Why? Because if this was a legit debt, they would have that information. Tell them that you dispute the debt, and require them to mail you copies of what they think you owe. If they ask where to send them, tell them to whatever address you have on file. Hopefully you see what I am getting at. Give them nothing.
If they can't provide you with written proof - and in my case, they can't - thank them, ask them not to call you anymore, and hang up. They call again, report it to your local authorities.

scam...arthur abrams check services got a new number again...