Amaron — problem in battery

Address:

New Delhi, Delhi, 110017

Dear team,
I have purchased amazon bike battery on 26.09.2017 from shri ganesh auto parts kalka ji new delhi, with 48 months warranty but unfortunately from saturday 23.06.2018 battery is not working it is not taking self to start bike & when i checked it auto repair centre it said battery was dead.
I have lost my bike documents (Bike rc, insurance) last year in december 2017 warranty card was also in that documents.
You are requested to change my battery without any charges.
If some one lost its warranty card it doesn't means that this product not belongs to your company. Or he is lying to change battery.
I have called in customer care they said we can only take request or complaint but if you don't have warranty card we can't help you.
Model no is ap-btx5l & serial no is-bab0233r364191

Name - dheeraj kamboj
Address-h-2/6, 3rd floor malviya nagar, new delhi-110017
Mobile no-[protected]