Its a plague on the industry. Finally the FCC finally told carries middle of last year they could start trying to stop it. Its easier with Volte and newer technology. These dudes are slick though they will spoof a number on your network so it looks like legit calls. The FCC was a major problem though for a long time. There was almost 60 billion robo calls last year in usa it started breaking 5 billion a month midway through the year. As for getting money never gonna happen these folks are 95% in foreign countries. Sad thing is they are getting money from people or they wouldn't do it. Just don't answer it. If they don't leave a message don't worry about it.