firstly apply for and obtain medical records from hospital
2) The Medical Council of India has imposed an obligation on Hospitals as per the
regulations notified on 11th March 2002, amended up to December 2010 to maintain the
medical record and provide patient access to it.
3) 1.3.2. If any request is made for medical records either by the
patients/authorised attendant or legal authorities involved, the same may
be duly acknowledged and documents shall be issued within the period of
72 hours.
4) on basis of medical records consult another doctor . obtain his written opinion that there was negligence in treatment .
5) you can lodge complaint with medical council of india against hospital and doctor .
6) also lodge police complaint regarding negligence of hospital . police will send medical report to govt hospital to check whether there has been negligence or not . based on opinion of govt doctors case would be registered