Apollo Hospitals - Severe medical negligence

I took my mother Hasina Ahammed to Dr Suchandra Gowasmi (Apollo Gleangles,Kolkata) for the diagnosis of her disease in March, ****. She was dagonised with NHL. She prescribed * R chops with a promise of complete cure of her disease. But she gave one R chop ( and proceeded further giving her * chops).She didn't completed the entire course of her treatment without informing us and proceeded on her own way. Which paved the for my mother's ultimate death.
She then prescribed for radiation and offered a huge package for the treatment . We were emotionally and mentally pressurised to go for the radiation therapy which was absolutely unnecccesay for my mother's particular case. But after going through this huge expensive treatment my mother again diagnosed with a Tumor within a span of only six months. We went to her but she completely denied to further treat my mother and led us in the in midway of such an uncertainty because she had to attend an conference in abroad.We were forced to consult another doctor.My mother couldn't retrieve from her situation as there already a huge loophole in my mother's initial stage due to Dr Suchandra Gowasmi.Due to which my mother expired.