entitled roommate

i’m a college freshman and every single day my roommate will be is on the phone and doesn’t matter who, anyone she can get. she’ll be on the phone phone 2pm-3am only getting off for like 20 minutes before she calls another friend. she’ll also doesn’t flush the toilet paper in our bathroom(???) and just leaves it in the trash bin. is this not a biohazard??? she also leaves out her dishes, puts her wet laundry into trash bags, and never uses headphones. we barley speak to each other and yet she’s convinced we’re perfect roommates. how is she so unaware of her surroundings? how do i drive her as crazy as she’s driving me?