it is a Scam, don’t answer the phone if you don’t know the number, if it is import they will leave a message if they don’t leave a message it is because they have nothing good to say.
I NOW CALL THE PHONE COMPANY every time i get an illegal robo call and ASK them to make a report. I know they wont, however they get a call every time I get a call. Its their system. Time for them to stop taking the money and clean it up.