So there's a group of 3 girls in my class that for whatever reason hate the shit out of me.

They make a comment on everything I do or say and every time a crack a joke and everybody laughs they come back at me with some sarcastic shit.

Today, they lied to the teacher by saying that I bully one of the boys, wich is completely false. This can affect my grades or the relationship with my teachers since she actually believed them.

What should I do? Of course I kept my frame and didn't react emotionally to any of their bullshit but man this is really annoying considering the fact that they do this on a daily basis.