Reg: Death Certificate Issue

Hi Expert, This is regarding my Dad's death certificate issue. My Dad was admitted in Patna's hospital as he had a severe brain hemorrhage, and since his condition was getting worse day-by-day, the family members and everyone suggested me to take him to Delhi for further treatment. We planned and took a train ambulance with ventilators and all facilities required. When we reached Delhi and doctor took him for close examination, they found his pupil was already dilated, meaning he died during the journey. Hence, the hospital put a stamp on the initial examined document issued as "Brought Dead", now I am unable to get a death certificate in Delhi as they say the patient was not even admitted (also his medical file was not prepared). On the other hand, in Patna, they are not agreeing either, stating that the place of death is not here. Please provide me the guidance as to which place will exactly fall for his death certificate jurisdiction. Its already been 4 months and things are stuck. Kind Regards, Ankit Anand