evil eye - She is possessed and thejinni speaks on her lips and refuses to leave her

My cousin (daughter of maternal aunt) is possessed by a jinni
whospeaks on her lips with aman's voice and says that he will never
leave her because he loves her. We have taken her for ruqyah many
times and every time he speaks and says that he will never leave her.
What should she do?.
Praise be to Allaah.
Firstly:
We ask Allaah to take away from your cousin what she is
experiencingand to heal her, and divert that jinni away from her, for
He is All Hearing and Ever Responsive.
Secondly:
The remedy in this case and others is ruqyah as prescribed in
sharee'ah, which may be done by the sick person himself or by one who
is treating him, and it will be beneficial by Allaah's leave. But it
may need tobe repeated and you may need to do other things to help it.
We will mention the most important of these things here:
1 – Reminding the sick person to always recite the adhkaar for
morningand evening, when going to sleep, eating, drinking, entering
and leaving the house, and to say a lot of dhikr in general. The best
of dhikr is reciting Qur'aan and the most important passages to recite
are the Mu'awwidhaat (soorahs seeking refuge with Allaah),
al-Faatihah,Soorat al-Baqarah and Aayat al-Kursiy. The more the sick
person perseveres in dhikr, the more the shaytaan's influence on him
will weaken, and he may be expelled by means of ruqyah.
2 – The ruqyah should bedone by a righteous person who adheres to the
Sunnah and who shuns bid'ah, humbug and witchcraft.
3 – The sick person should turn to Allaah a great deal and ask Him for
help, for Allaah answers the prayer of the one who is in difficulty
and relieves hisdistress, as He says (interpretation of the meaning):
"Is not He (better than your gods) Who responds to the distressed one,
when he calls on Him, and Who removes the evil, and makes you
inheritors of the earth, generations after generations? Is there any
ilaah (god) with Allaah? Little is that you remember!" [al-Naml
27:62]. Especially if the du'aa' is offered at times when a response
is more likely, such as between the adhaan and iqaamah, just before
dawn, in the last hour after 'Asr on Friday, when breaking the fast,
and when travelling.
4 – Always offering the five daily prayers on time.
5 – Repenting to Allaah from sins that may be the cause of the
shaytaan gaining controlof a person.
6 – Purifying the house of things that the shaytaan loves, such as
images, dogs, music and singing. Imagine this devil being cornered and
having no food or drink or pleasure. He may be deprived of that by
saying the name of Allaah over food and drink and by getting rid of
things that he loves. Would he want to stay?