Amaron — Bike battery is warranty period but not replacing

Address:

Rallaguda,Shamshabad,Telangana,pin-501218

Dear sir/madam
My battery warranty card is lost, and my battery not working, then I travelled to amaron dealer who located in Shamshabad they check my battery and tell now battery is not in stock so Come next week when I go then they without warranty card we cannot give replacement, actually I brought battery month September 2020 as per battery manufacturing date mention in battery is 24june 2020 which is under warranty period they people know very well but they people playing and telling battery is warranty period but without warranty card we cannot replace..I am attaching image for your reference..
Please do the needful
Regards
Bikash