I submitted an invention idea over 3 years ago, and have asked them to remove me from their contact list multiple times (literally at least 3 different times) and the calls stop for about a month or two, and then they call again. Worst company ever!!!
Got a call, phone (Nexus 6P) immediately says Potential Spam Caller. So I don't answer. They leave a voicemail. In a very mumbled voice, "This is Steve with Davidson...blah blah blah, please us back at 1-800-559-6802." Nah, I'm good. In the words of the late great Gene Wilder while playing Willy Wonka, "you should open your mouth wider when you speak."