Do the following for the person affected by Jinn:
Read 11 times لاَ حَوْلَ وَ لَا قُوَّةَ اِلاَّ باِللهِ العِلِيِّ العَظِيْم , blow in a glass of water and give the patient to drink.
Again read 11 times لاَ حَوْلَ وَ لَا قُوَّةَ اِلاَّ باِللهِ العِلِيِّ العَظِيْم and blow on the patient.
Do this few times daily for 7 days.
InshaAllah, one will find relief.