ANSWER:
This person is a soothsayer or an imposter pretending to be a raqi.
Such people are professional liars and they make millions out of people like your in laws. Believing them takes a person out of the fold of Islam. Listening to them without believing them makes the prayers of 40 days void.
If you maintain your daily adkar, you will be protected from every evil with the grace of Allah.
PROTECTION:
You must maintain your 5 daily prayers on time without fail. Fix a time for reciting Qur’an everyday.
Maintain your daily adhkar of morning and evening, before going to bed, after every fard prayer, while entering the washroom, while going out of the house, before eating etc and this will act as a shield against everything evil with the Mercy of Allah. You will find these duas in a booklet called ‘Hisnul Muslim’ or ‘Fortress of the Muslim.’
RUQYA FOR CURE:
Do ruqya on water, preferably zamzam and drink lots from it throughout the day and night and also bathe with this water until you’re cured by the will of Allah.
https://www.assimalhakeem.net/what-is-ruqyah-and-how-one-should-do-it/