These people are cell phone bor dialing spammers who skirt unsolicted sales call laws by pretending that you're a past customer of theirs and leave bot dialed voice mails (assuring to mention their phone number) in hopes of likely bilking the aged out of whatevers left over from our already ripped off social security monies.
Today I got a robocall (with CallerID of "Private Caller" and no number shown) from "Lewis Cleaners," as wguru said, sounding like we had an existing relationship, which we don't. After I post this, I'm going to find their Yelp page and leave a negative review stating that the company trolls with robocalls, which may affect their rating on Yelp.