Tata Motors — Door latch problems in Nexon car

I have a Nexon car, which has got 02 door latches non-functional within 02 years of age. This is very serious issue art safety of occupants on road.
While reaching to authorised service centre they had only single latch and they replaced it in font door on chargeable basis.
Services offered are also not upto the mark.
I used to go only at one service centre which is @ 70 KM's from my location.

I am using the car with one door out of service for the non availability of the same at Tata service centre.
I must get this replacement free of charge. Please guide on this matter.
This item is not so delicious to damage within 2 years.