I've been getting bullied sort of hardcore for a while (long story) and some girls kept stepping on my shoe multiple times today between classes on "accident" and they were all laughing at me silently and they keep annoying me, and I told them to stop so many times but they didn't, so the next time they step on my shoe do I have the right to defend myself like by pushing them or something? I've talked to my teachers and the counselors and even the principal, and they haven't done anything about it, and when they do, it doesn't work. They just keep coming back! They won't even let me switch classes or anything, since they're all full, and even if they did, the bullies would always find me in the hallway between classes or in lunch! What should I do??