What is the reason for the psychological disorders, including doubts and hallucinations, that have afflicted my 45-year-old aunt for the past 6 years, and what is her treatment, especially since she has not benefited from doctors or from shaykhs reciting verses about sorcery, the evil eye, and jinn?

What has afflicted this woman is an affliction that requires patience and striving against it with medicine and consulting doctors. Despair of Allah's mercy is not permissible. Ruqyah Shariah (Islamic exorcism/healing) is beneficial in all cases, and persistence in it is required. Healing may be delayed due to a wisdom known to Allah.