How to stop telemarketers and scam?

I seriously get 5-7 calls a day from random telemarkers and scammers. I've downloaded Mr Number on Android which can block and detect some numbers but every number I get seems to be different. Is there any way to stop this once and for all?

Example from just today:

http://ift.tt/2x6MkeF

Submitted August 31, 2017 at 03:05AM by Recreational_Autism http://ift.tt/2vGHIsl