Chevrolet India — Brake failure and starting problem

My brother bought a pre owned Chevrolet beat diesel LT from a dealer in mangalore (model - 2012). After one month not even driving for 150km, there was a sudden brake failure on road when my brother was driving it. My parents were also inside car. He quickly used engine braking technique and stopped the car. There was a possibility of fatal consequences. Who is responsible to repair this now? The dealer from whom we bought the car or Chevrolet india itself?
And also next month after this incident the car is not starting. My brother tried for few times and days to start, but still no luck.
I need these 2 issues to be resolved by either Chevrolet or the dealer(whoever is responsible) soon.

Registration No : KA19MC6188
Location : Mangalore, Karnataka
Company : Chevrolet
Dealer :