As the title says, I live with someone who torrents and downloads shit 24/7. I blocked his laptop from connecting to internet few months back via router settings and the internet speeds are still incredibly shit. It’s so bad I can barely load up a tik tok. I’ve searched everywhere online to figure out how I can stop him or even limit his torrenting but have found nothing. We’ve called him out in the past but he swears up and down that he doesn’t do it despite the evidence I have of him. Do I call our ISP to stop him? What do I do?

Any help is appreciated