School bullies!

Hello everyone I just need a little advice. My daughter’s been getting bullied at school by a little boy. He’s called her a roach, made a fake roach spray and pretends to spray her with it, makes fun of her school lunches calls her a big back and also calls her and her friends “cr*ck heads” I’ve reported it to the school numerous times. The boy went as far as telling my daughter she should kill herself I was furious made a huge deal and the teachers outcome was to move my daughters seat and isolate her from the group she was previously in so she could sit closer to the teacher. I was furious i went to the principal and insisted my daughter were moved back. Today the teacher moved her to a new group pulled my daughter aside and stated she had previously moved her due to several complaints of distracting peers from doing their work, and talking a lot. (Which was never an issue my daughter is a quiet and shy girl) . She told my daughter if she gets one more complaint she’s sitting her alone “period”. I feel like this teacher is being a huge bully! What do I do? Please send me all your thoughts. 🙏🏼