No msg , I don't pick up unknown numbers.

This number keeps calling and not leaving msg.

Just left me a message on my cell phone basically threatening me and saying that some claim had been filed against me and I need to call them before someone comes looking for me and interviews my peers and supervisors. Sounds like a scam to me!

It is a scam.

You are not notified in advance if a summons is coming AND it is illegal to discuss matters with a third person.