<human>: Give me a shortened version of the text

I live in a house that is informally divided up into 2 flats. I share the downstairs with a girl, and about 5 people live upstairs. I say it's informally divided because there's nothing preventing us from accessing their area (i.e just walk upstairs) or them from ours. We share a hall which my bedroom is off and a front door.

Anyway, every month or so one of these upstairs people (I'm assuming) gets really drunk and comes home after a night out and starts pounding on the front door, which is right beside my bedroom. The first time it happened I was really terrified as I didn't know who it was, just that there was someone trying very hard to get into my house by banging hard on the door in the middle of the night and fiddling with the keyhole. The only reason I now assume someone upstairs is doing it is because it keeps happening, and cos eventually someone comes along (from somewhere else outside) and lets them in - I assume another upstairs resident back later from her night out.

It happened last night and went on for 3 hours! It gets really scary being alone in my room and hearing someone basically about to break the door down. The reason I don't let them in is because firstly, I can't be sure if it is someone from upstairs. Secondly, whoever it is clearly sounds very drunk and aggressive. Thirdly, I'm just not comfortable opening the front door out onto the street myself in the middle of the night. I'm 5"3, there's no latch, and there was a murder five minutes from my house just two days ago.

I have told my landlady who has (according to her) spoken to them numerous times now based on my complaints. But nothing seems to have changed. I do consider calling the police but because the house is so informally divided I'm afraid they'll think I'm just wasting their time if it does turn out to be a reaident of upstairs. Who rings the police about a person trying to get into their own home? So I'm really not sure what to do about the situation. Any advice?
<bot>: a person I assume is my neighbour pounds on the front door and screams in the middle of the night. I'm scared, losing sleep, and unsure what to do.