Roommate smells like crap in Block 10

My roomate doesn't have bath for a week doesn't apply any kind of deodrant wears the same clothes for a week smells. Even after telling him to have a bath on regular basis he doesn't seem to care.He sleeps early and shouts when I turn on the light for studying. My friends also have told him to have a bath but he refuses to listen. What should I do I am fed up of him. Plzz help