Whenever there is a call that comes in at my place of business that I am certain is a spam/scam call, I always wait a second before speaking. Whoever was on the other line was speaking to someone else in the room, as soon as I spoke, I heard a click and then the recorded message in regards to the google listing enhancement.
They call at least once a week if not more. I have them programmed into my caller ID as scam/spam like the rest.