Medical Negligence

Hello there, I want to file a medical negligence case. but i have some queries related to it. As my father was admitted in a hospital where he fell down and fractured his hip bone. Doctors referred him to another hospital for hip bone operation. The doctor of first hospital said that it is not possible to operate him here as here are no facility. But sir in that hospital if neurological operations can done then why not orthopaedic? But they only wanted us to leave the hospital immediately. When we went to the second hospital they just had some x-rays of my father's hip bone. When i said him that my father is facing so many problems & i want his complete treatment. But they didn't mind my point and they just operated my father when he was not in a good condition. After 3 days of operation my father got discharge from hospital. Though we said to them my patient's condition is not well. And i don't want to take discharge. But all vain and they had discharged my father. After 4 days my father started getting disoriented and after some time he went into coma. when we took him to third hospital the doctor said he is suffering from serious neurological problem called "Tuberculosis Meningitis". When i discussed about it to doctor he said this problem takes time to develop so it must be a misdiagnosis at previous hospital. When he asked me about symptoms i came to know that these a symptoms were present at first and second hospital also. When i tried to find out it was a stupid thing that is the second doctor has very strong connections with first doctor and hospital so they all were only trying to save their hospital's reputation. So i want to know that is it possible to file a medical negligence claim against two hospitals at a same time. And if it is, then how will i prove it that they both were together against my patient because i don't have any evidence for it. I really need to file it because my father is completely on bed cause of their negligence. This life is worsen than death. I really need help. I only want to win because i don't want these doctors to practice more on humans and ruin their life. Its not only about my father. Please suggest me something. Waiting for reply!! Thank You