Hello @Elia
Sounds like you are having a tricky situation at the moment especially since various forms of methods and strategies have been ineffective or unreliable as of late.
Personally, I have also had considerable amount of times of bullying, as I was very much the weird and eccentric one in school, which typically involved me being picked on by my peers (albeit they changed as everyone got older in the high school)
In any case, this sounds tough, have you talked to any other teachers that you trusted as well? Perhaps another teacher might have a different perspective or may be more receiving of your situation at the moment?
Have you perhaps also reached out to your school counsellor, perhaps that could give you some insight?
I would recommend online platforms like KidsHelpline and/or Headspace which might be able to make use of if getting a counsellor outside is a bit more difficult for you at the moment.
I hope this was of help and I wish you well.
