I received the same exact message as the others. The call indeed is a scam! Someone who is looking to use scare tactics. And he is trying to make money off of innocent people in the process. This person should be accounted for their actions.
Left a VM that they wanted to make an appointment at either my home or work place to serve me a summons. Claimed that if they attempted this twice without success they'd file a "failure to be served". When I checked the internet, Discovered that many have received similar calls like this from this #. It's a scam, Think they're seeking to collect on a nonexistent debt banking on the the person being freaked out by "legal summons"