<human>: Provide a brief overview of the text.

Last week, I moved into a new flat. However, it appears that the person who lives directly above me does not want me to ever sleep: I can hear them constantly stomping around their room, so hard that my lights rattle and sometimes even my bed shakes. I was woken up at about 8am by it, and it's now 2am, and I keep hearing the footsteps, every time they go to the bathroom/kitchen/whatever.

It's just ridiculous. How can a person be so inconsiderate? I feel like, to create that level of noise, you have to make a conscious effort to stomp so hard.

Anyway, I was wondering on how to possibly diplomatically ask them to... stop being so heavy-footed? But this is where it gets tricky.

I can't just go up and knock, because every corridor requires a specific electronic key to get into; I can only access my corridor in the whole building. So, I could maybe leave a note under the door of the corridor, but, I'm not even sure which number the flat is (the numbering system seems to be pretty illogical here).

I also think (but am not entirely sure) that the person might well be a girl (who I'll call Grace) who is around my age (early 20s), and is the sort of 'warden' of the flats, although I don't think she still has that role. But yeah, so, if I send the note, and it's her flat, she'll know that it came from me - she recognises me from when I met her on the first day.
<bot>: person above me stomps around all day and night, and I don't have access to their corridor to just go and knock and say something. Help please!