Exide Industries — Exide Battery - Claim rejected within warranty

I purchased a Yamaha Fz v 3.0 bike on 26 January 2021. Exide battery was
used in the bike. After use of 2-3 months, the battery started giving problems like discharging quickly, etc. I went to the Yamaha service center to claim the Exide battery with the battery's warranty period.
Complaint Details

After a few days, I got a call from the Yamaha service center that my battery is rejected. The Exide company official told the service center guy that battery has terminal leakage and it is not covered in the warranty.

But they haven't specified any terms and conditions with Yamaha company. They have not given anything regarding battery rejection in writing.

I have attached a photo which I got from exide company guy