How can a committed person afflicted by jinn possession, who suffers from the jinn's control over his tongue and from falling into watching pornography, rectify his religious affairs after four years of ruqyah?

The guile of the demonic qareen (companion) weakens with the strength of obedience to Allah and His Messenger, as Allah Almighty says: "Indeed, the plot of Satan has ever been weak." The qareen is a devil that enjoins immorality and forbids what is good, but Allah aids the servant with a sound heart against this qareen, rendering it unable to lead him astray. And when Satan instigates, one must seek refuge in Allah from him.