My struggle with Apollo Munich health insurance in India to get a reimbursement for my claim

I have been a customer of Apollo Munich health insurance for the past 5 years. In June 2017, I filed my first reimbursement claim after I was admitted to a hospital from June 10, 2017 until June 15, 2017. My claim was rejected on 30 2017 for the first time stating that the need for hospitalisation has not been established. Since then, I have made 12 phone calls , sent several emails to customerservice with the documents and submitted the documents to their local office multiple times only to get an email  from Apollo Munich asking me for more medical records for the illnesses that I'd never had or rejecting my claim stating that I was only taking oral medications in the hospital . As evidence that I suffered from the illness that they claim I have suffered from, they attached the medical records of some other person was 65 years old and has got completely different medical condition. As evidence that I have been only taking oral medication the hospital they keep on pointing