I'm exasperated by the behaviour of my mother and I don't know how to make her stop, please propose some solution... I'm a 21 year old student far from home most of the year, and I'm currently in my summer break at home with my parents. To summarize my mother always has some "compelling" problem or thing she wants to externalize to me. Now, I perfectly understand she doesn't get to see me everyday but she's always been like that, growing up a little less so, but I always had to fight with my teeth and nails to prevent her from snooping around. It's not even about privacy really, it's just that I don't want to see anyone when I'm doing my stuff and it's easy for me to lose concentration. It really gets on my nerves to be interrupted by useless stuff multiple times a day and I feel like my mood & day-to-day relationship with my mother is getting strained by that. Now I never want to see or talk to her which is sad, but she completely crushes the boundary I try to affirm and I feel like I'm 16 again.
I tried to communicate with her and told her everything about how I feel, my desire of being left alone but she's completely ignoring anything I say, it's not like I don't explain myself well enough or she's misunderstanding: she's willingly downplaying and ignoring what I say to her.
I thought about
putting a trap at the door, but I don't want to hit my father who has nothing to do with her behaviour and
putting a barricade but I need some airflow in my room as it's too hot to let it closed and moreover I don't want to keep it shut if there is something really urgent and I can't hear it because of my headphones
So I conclude it's probably better to seek an interpersonal solution that can mitigate or make her behaviour stop, but how do I communicate with someone who's just not listening?