This number keeps calling threatening to press criminal charges against me.

I just received a call about some loan and they said I have received paperwork from this loan and I have not received any paperwork. And they said since I am not willing to pay I will be going to court.

Person barley spoke English.  There was a lot of background noise.  The person was trying to contact ex-son in law whom have no contact with.  He has no idea what my phone number is nor would he list me as a contact person.

So did you ever get served with papers?

They're just trying to scare you.  You might have a legitimate debt that these folks are trying to collect on but when they start saying you'll go to jail, arrests, criminal charges etc. that's B.S. and technically illegal.  Hang in there, change your numbers, get ahead of them.