All perfect praise be to Allaah, the Lord of the worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and messenger.
It is religiously established that the Quran, supplications and the legislated mention of Allaah are a useful treatment for magic. In a narration on the authority of ‘Aa'ishah the Prophet once entered upon her and found a woman treating her and applying Ruqyah to her. He, sallallaahu ‘alayhi wa sallam, ordered the woman to treat her using The Book of Allaah (i.e. recite Quran). [Ibn Hibbaan]
Some scholars permitted the recitation of Ruqyah over water and then drinking it. Saalih, the son of Imaam Ahmad said that when he was ill, his father used to bring water, recite Quranic verses over it and would ask him to drink it and wash his face and hands with it.
Muhammad Ibn Ibraaheem Aal Ash-Shaykh, Abdul-'Azeez Ibn Baaz, Muhammad Al-‘Uthaymeen and others also permitted it.
Vomiting is one of the ways that an individual may get rid of an illness, be it magic or otherwise, as stated by Ibn Al-Qayyim . Thus, it is permissible for you to seek treatment from this man, as long as he is known for being religious and for having a correct belief.
Allaah Knows best.