My question is a person believes that his one of the relatives has done black magic on him after which he is suffering from diseases and abnormalities, he prayed a lot but can’t able to get rid of the situation, he went to the Hussain tekri(India) but still facing issues.
1. What should he do in this situation
2. He also stopped talking and keeping any kind of relation with those who done this magic. Is this right that he broke the relations?

Please convince him to see a good doctor or have some session with a psychiatric. Offer his Salat and do Ebadat go to the Majalis and don’t listen nonsense about black magic and witchcraft etc… Seek help from Allah and follow the lives of Holy Prophet (saww) and his emasculate progeny.
May Almighty Allah guide all of us and remove superstitious thoughts from our minds.