I have a friend who is suffering from witchcraft/magic/Jinn. A Sheik have been reading Qur'an on him for 4 months now and everyday a number of Jinn come out of him but till now he is not cured. What is to be done for him?

Praise be to Allah, the Lord of the World; and blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
Dear Brother,
We ask Allah to cure your friend and protect him and us from evil Jinn and human beings.
We advise you to continue reciting Qur'an upon that person since Allah cures people through the Qur'an.
For more details, please read to Fatwa:
81559, 81643 and 81667.
Allah knows best.