I Have a Question

how do i get a neighbor to stop cranking up the music? i have one like that, and hes always bringing this girl in thats not supposed to be there and shes the one cranking it, ive been woken up at 3:30am before too and 1am this past wknd, ive had to call the police in the middle of the night to go turn it off. i shouldnt have to do that. he leave the outside doors open for his girl to come in too, that is unsafe for the rest of us, why is he allowed to do all this? why isnt he getting kicked out for all this? any ideas? he lives right under me so i hear everything he does