There are carrier based services that do fuck all for spam calls, what you really need to get rid of them is Google Assistant call screening. Yes, Google is a giant evil corporation with anti-competitive monopolies and “AI” that will lead to the eventual destruction of the Internet we know and love, but their call screener is top notch. It answers the call and the spammers have to talk to a robot to get through to you. That’s cut down my spam call volume dramatically. And if it flags someone accidentally they just say who they are and I can decide to answer.