My teacer hates me!?

I need some help ok at parent teacher confrences she said i was stuck up and snoby and now today at lunch christin started this rumor i called sam a lesband and i didnt so sam told my teacher and i said that i never said that but mrs a the teacher said that souns like something i would say! Isnt that messed up!and on my papers she writes so what and like duh on them! She also mean to all of my friends and no one else like today my friend kelsey was laughing and mrs a said that has nothing to do with social studies!! And she got in trouble! She also took of points on a test of mine when the answer was right just to see me fail! That is so stupid Now i am ping every cl with an a but my teacher is trying to make me fail i wanther fired asap!!! WHAT SHOULD I TELL THE PRINCIPLE! I HATE MY TEACHER AND SHE HATES ME! hOW DO I GET HER FIRED????