Block it if you can. REAL process servers DO NOT call first. Think illegal scar tactic. If they call again DEMAND their bar license & where they are allowed to practice (bet you don't get anything but excuses & yelling).
NOTE - same number, two different companies named.
I have this exact same voicemail on my phone and my mother's phone im glad to know it's a scam and not real it was a big red flag for me cause they used my maiden name not my married name that's on my social security card