This robo-call didn't say who they are and instead leaves you only an option of either askng for a call-back (permission to solicit you) listening to their marketing policy or leave a voicemail) at no point do they have the honesty just to say who they are or remove from their list And find out who violated the law
No message left. I don't answer callers I don't recognize, and if they don't leave a message, they aren't important. By answering, you just let the robodialer log you as a phone with a person that will answer - then the telemarketers start calling.