بسم الله الرحمن الرحيم
Get complete Surah al-Baqarah recited by any pious person and blow it on water. Drink that water for forty days. Also recite بسم الله الرحمن الرحيم after each salah 100 times. In-shaAllah, all the effects of jinn shall be removed.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.