I used to get tormented on the schoolbus in the 8th grade by a group of boys. Every day. They would scream things at me, a few times one would bring a balloon and poke me in the butt as I was getting off the bus, they were AWFUL. I used to go home and sob.
My mother called the school, talked to the bus driver, the principal, nobody did ANYTHING.
It was awful, and I still remember those boys and every one of their first and last names.
I tried yelling back at them as I got off the bus, giving them the finger silently as I got off, nothing made them stop.
So, I took matters into my own hands, and when I'd see one of them in the hallway in school and there were a lot of kids around, I would casually kick them REALLY REALLY REALLY HARD AS I COULD in the shin as I walked by them. I wouldn't move my head at all or make eye contact, I'd just kick them as hard as I could and keep going.
I actually got a pair of pointy ballet flats for this very reason...to make them hurt as much as possible.
I know violence is never the answer, but my GOSH. I was in so much pain that year because they used to torment me so much on the bus and nobody would do anything to make them stop.