what to do if someone wants to kill me

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i am now studying in korea with scholarship, and i rent a room in a small building outside the campus, now someone wants to kill me and i don't know what to do! the thing started like this, i put my clothes beside my door after washing them for almost one year, this year, a man moved in another room at the same floor, he thought my place was better to put clothes, so he forced me to move my shelf into my small room, though the place is near my room. however, this is not the end of the story, when i was moving my shelf, i said unhappily:" why always bully people from the same country!" and he heart that. now he always makes loud noise in the night to keep me awake. but the most scaring part is this, i have found for three times that someone had come into my room when i was not at home, and i am so afraid that i am already been poisoned! i really don't want to die abroad, and i don't know how to avoid it, this man seems that if i was not dead, he won't be satisfied! by the way, i don't have much money to move, and i even don't know how to tell my professor if i want to run away from danger. what can i do...