Call back gets "...the number you have dialed is not in service." That means it's SPOOFED. They're hiding behind fake number so they are either SCAMMERS or a highly unethical "business." Either way, they deserve to be blocked.
kept calling, and after telling them not to call me any more because I neither needed or wanted anything service from them, was given the answer: THATS WHAT YOU THINK!......losers, harassing,