Just keeps calling. dont know number

I got this call it was a recording stating that i was at fault for something. then it cut off the message. It sounded like some kind of prank but im not sure what it is

830 584-1495 is calling a State District's Judges phone and identifies himself as Mitchell & Koreshi; I have no idea who this is and we are debt free. I will file harrassment charges if the calls don't stop. The call appears to be of a debt collection nature, but it very vague.

Calls me repeatedly on a daily basis for a person who no longer has this #. Before I blocked it, it was leaving prerecorded messages with threats of legal action.

I just use a call block app to pick up and hang up (Mr. Number)