Tata Motors — Part replacement under warranty

Address:

Shrirampur

I purchased TATA Nexon XM on Mar 2022.on 10.9.23 while travwlling a stone hitted the car from downside resulted into damage of silensor of vehicle. I reported car at service station MAX MOTORS Ahmednagar. They said silensor needs to be replaced and it costs ~ 1.09 Lakhs.
Now tell me
1.if a stone scratching car from downside costs 1.09 lakhI, is TATA Motors car quality so weak??
2. Why the body of silensor is given ~2cm below other part of body.that below the ground clearance provided

I need complete replacement of that part free of cost as it is in warranty else keep your car with you