الإدارة، الشحنة، الضجيج

관리비 is the building fee. It is not rent. Mixing them in a chat with the landlord starts a longer night than you wanted.

택배 왔어요 is what the speaker or the 관리실 says. 층간소음 is the reason people text instead of stomping back.

고장 났어요 covers the boiler, the door, the sink. Take a photo. Send it. Do not write an essay in English first.