Xiaomi India — service centre refuse to repair mobile under warranty period

I purchase MI Note 7s Mobile from flipkart. order 25th May & Delivered 27th May 2019.

I facing a problem in Fingerprint sensor, Its not working. So i visit the nearest Service centre at Malda Town, West Bengal, 732101, India.

But they refuse to repair this mobile, they reply that they will be repair this but no guaranty if mobile will dead.

I want to service about this matter.