You need to get
https://www.nomorobo.com/ it's even available for cells phones! We still have a home phone as it's part of our internet/cable/phone bundle. I have the nomorobo and all my telemarketer calls get zapped. The phone only rings when someone I know or a legit place calls me. I love it.
I don't like people bugging me on my cell phone either, I find it intrusive. I know I can just not answer, but it bugs me; what do they want and I can't LET IT GO! This way only if it's an emergency do people call me on my cell. Most just call the home phone and leave a message.
I might switch to another cable provider that doesn't offer phone but I've been dragging my feet because I didn't feel like learning the whole port home phone to google voice thing, ugh.