It's a fishing trip, trying to get you to press '1' and it shows a real person and now you will be slamed with a live caller. Do NOT press any number, put the unwanted caller on your reject list, create a contact named 'SPAM' and hang up.
NOTE: Robot spam calls are on a auto-dialer 24X7. All cellphone and land line phones your carrier sells your information. YOU have to write a written letter and mail to your carrier to opt-out of all afflities sharing your info. Most of your calls will stop. Even if you put your numbers through the donotcall.gov.