Who are the mentors at your school? Are they professionals or parents/volunteers? A parent/volunteer is bound to make a mistake you mentioned. I suspect the mentor did not deliberately mean to harm you but she was not adequately trained to do the job. This does not excuse her. Hope you do complain to someone like the principal or someone else who is in charge and understands. These mentors need to be trained better. Other students have probably also been hurt. In the meantime take care of you. People here do care.