In a situation. Problem is as usual it's she says vs they say. They being small group of girls who are bullying my dd. They are 16 and it's pretty nasty. Online, messages, verbal and lots and lots of spreading false rumours. Slut shaming, making up stories about her bad mouthing people she hasn't.
Ultimately if there is no 'proof' how does a school deal with it. Obviously no one is going to admit anything