Nissan Motors — Poor service incurred me lakhs to fix the car

I was delivered a manufacturing defect car in 2017 with faulty fuel pump, from the first service i have been complaining about power drop in the car and clutch issues but they always ignored sating that the nissan micra is generally low powered vehicle so thats how it drives. They never cared to work on my complaints, however the issue escalated and i had my car stalling at multiple occasions, after my rigorous followups they finally identified that the fuel pump is faulty but agreed to change within warranty for free after multiple arguments.
Then i had a car accident which damaged the front portion of the car, they missed to analyse the breaks and majorly just claimed the cosmetic fix in the insurance claim, had they checked the breaks, i would have claimed it insurance. But now i have to pay 1L for breaks and clutch to get my car fixed. Why do we insurance then, why do di we have the ServiceCenter then, I have been lied by then all the times, mu issues were neglected all the times and now i hae to incure loss by spending so much unnecessarily on this low budget car, feels devastated, need someone to look into this so I don’t pay for Nissan’s negligence, thanks..