Need urgent money for head injury operation for minor

Hi my name is Harvinder Singh. I'm from India my wife study here in Australia & I'm also living with her. My 17 years old son met with an accident in India & got head injuries. My wife flew away to India on very next day. He's still in coma & on ventilator from 04th Dec 2024. I spent all of my savings on him. Doctors said they can't give any exact time for recovery. Right now he's in Krishna Hospital, Haldwani, Nainital, Uttarakhand, India. I am facing financial difficulties to keep him at hospital. Please help me.