Appears to be a scam, notifying people of a upcoming law suit against the you, attempts to call back were not answered or the person is not available, probably bouncing calls from bogus phone line to another to cover their tracks
They are located somewhere in Texas. Not being able to hear the entire message left, I called them back - they claimed to be IRS, but the man that answered has an extremely heavy accent and I could tell it was a call center by the background noise. When I questioned him about being IRS - he started making obscene comments, so I hung up and blocked his number. Obviously this is a scam - so don't bother calling them back or answering these calls!
NEVER answer a call from an unknown number EVER...if they need to speak with you, they'll leave a message. Period.
2 calls from this number, with messages about a law suit from my "Local court"...bottom feeding morons...what a horrible way to put food on the table. It can't be easy having such serious limitations.