Maruti Suzuki India — repair charges taken when vehicle was under warranty

Address:	Lucknow, Uttar Pradesh, 226016
Website:	Marutisuzuki

I would like to bring to your notice that i have purchased maruti wagon r from ktl maruti showroom, indira nagar, lucknow on 27th nov 2016. After some months the car broke down and the engine started making heavy noice, so i gave it for servicing on 14th oct, 2017. They made a bill of 48, 000 inr. When i told them that it was under warranty i was denied for that. But as per warranty conditions, the warranty holds till 40000 kms or 2 years, which ever is first, and my car had ran for 39680 kms. So that means i was eligible for the warranty.
Could you please have a look into the issue and help me with utmost possible solution.
I am hereby attaching bills for your reference.
Waiting for your kind revert.