My cousin had this – in the end she went to another school and is doing far better there.
The head actually locked her in the office with my Aunt and refused to let them out the room and accused them both of making it up. She wouldn’t let my cousin leave as she was meant to be in lessons but her GP had made her stay off as at 12 she was suffering from stress and starting to show signs of eating issues.
I used to do work at said school as part of a council job I had – we weren’t allowed to attend the school without a senior manager present as she would verbally abuse members of staff from the LEA.
**** bitch that she is.