Mental harassment at office

Hi, One of my family members is facing severe mental harassment at her office. Its been going since many years, but the condition has become worse now. She has been called for interview for assistant Library post and all her qualifications matched that profile, but later they appointed her as library clerk(which is not any valid post in the university bylaws),so she objected this and the case is in high court now. Except this the principal has been creating difficult situations for her at workplace and provoking other officers and office employees to treat her badly, putting cctv which covers her residence entry and also there are no cameras in clerk room and principal office. Also asking unnecessary clarifications on taking urgent leaves. Even they did not give her working days salary for 3 months just bcse she did not come to library on holidays which are officially given to library staff(as they say she is a clerk and hence not eligible for these holidays). When she asked them that when is she going to get her salary, they threatened her to have her suspended. We are looking for expert opinion on this matter, bcse this is resulting in her deteriorating metal health.