I found a new strat to stop getting calls from telemarketer scammers; RUDEMAXXING (maximum rudeness, minimum politeness).
Just yell at them, be rude as hell, and most importantly just say slurs like 'pajeet', 'faggot' and 'nigger' over and over again. Guarantee they hang up in under 20 seconds and you are off the call list permanently. One time I was having a very bad day and had food poisoning, so as soon as I sat on the toilet about to rip ass, a scammer was calling me(can tell from area code), so I held the phone on speaker right above the toilet bowl and unleashed a DEAFENING blast of piss and gassy diarrhea shit hitting the water full blast. The dumb bitch said "EEWWW GROSS" and hung up 10 seconds in LMAO.
I get WAY less calls from them now. Longest I went without getting one was 3 months kek. This is financial advise to invest in phone companies.