My cousin is irritating me?

im on vacation in colombia sleeping in the room next to his. he comes to my room every night cuz i cant lock the door and annoys me like 5 times every night.the other night he asked me if i masturbated and he tried to tickle me and he touched my and it felt so wrong. no one wants to help me and ive already tried to prank him and he got so pissed and i asked him why he was allowed to annoy me and i wasnt allowed t annoy him. idk wat to do please help me!!!!!!!!!!!