The bad guys complain first when they do bad things. What should the wronged people do?

I told my parents at home that I made a big deal out of it on purpose.

Then ask parents to go to school,

Then call her parents, too

Take the opportunity to say that she often lives with others (it is best to take some videos and photos to prove that she won't sleep at night)

When her parents deal with this matter, they can interrupt as appropriate.

Then. She can forget about it first, and then tell your parents and the headmaster how the teacher handled it.

And then it will be ok soon.

Play her to death.