Seeking Guidance on Ruqyah for a Person Possessed by a Jinn Who Recites Quran

Assalamu Alaikum wa Rahmatullahi wa Barakatuh, I am writing to seek your guidance regarding a specific situation involving my maternal uncle (aged approx 60–65). My uncle is completely illiterate ,he cannot read or write any worldly language, nor has he memorized any surah of the Holy Quran. However, he has been afflicted with jinn possession for a long time. When the jinn takes over his body, he closes his eyes (my uncle's eyes) and recites Qur’anic verses or any surahs accurately, without any apparent mistakes in pronunciation, despite not having memorised them himself. We intend to seek Ruqyah from a qualified Raqi to help cast out this jinn. However, we have a concern regarding how the treatment will work or how the raqi deal in this particular case: 1. Since Ruqyah is primarily performed through the recitation of Quranic verses and authentic supplications, how will the Raqi approach this specific case? 2. If the jinn itself already knows and recites the Quran, will the Quranic recitation during Ruqyah still affect and repel the jinn?