What is the proper method for performing ruqyah on a sister who is suffering from demonic possession and sorcery, given that the jinn claims to be Muslim and unable to leave, and can she be cured by ruqyah shar’iyyah without removing the original eaten or buried sorcery?

To address the delayed recovery after ruqyah, there are two matters: The first is to persevere in continuing ruqyah and supplication, using Zamzam water and olive oil after reciting ruqyah over them, eating seven dates in the morning, and using seven Sidr leaves in water over which ruqyah is recited for the sister to drink from and bathe with, alongside increased supplication from her parents for her. The second is to purify the home from sins such as music and images. One can also consult ruqyah practitioners known for their adherence to the Sunnah.