This guy🤦🏻‍♀️

Is being borderline stalker! I can't go into detail of his obsessive behavior these past couple weeks I have started uni but right now he is knocking on my door. He's been outside my room for about five mins now, and knocked a lot. This isn't the first time this has happened. I'm hiding in my bathroom.
I told him to leave me alone a couple days ago and he agreed but messaged me earlier and now that I've ignored him he's here again knocking.