consecutive bullying

I used to go to an all-girls school and one of the biggest problems I faced there was the never-ending bullying I remember days where I come home crying. But what really affected me was when I first started high school i was very confident and wasn’t afraid of speaking my mind, I remember one day a girl sprayed me with sanitizer I reported her to a teacher, they didn’t believe me. From that day on that girl and a group of about 10 people, started to harass me . I reported them so many times that I can’t even count anymore. Nothing was done the school didn’t do anything to help me.