Popy Umbrella Mart — Popy Nano Silver Umbrella

I have purchased a Popy Nano Silver Umbrella from Police Society Kottarakara on 20 05 22 and the product used only four to five days maximum. Now I'm not able to open the umbrella and visited the purchased store with the umbrella. They have asked me to produce the bill for replacement and l have submitted the same. Then they have told me that the same will not be replaced and you have to repair the same locally.
I have been using Popy brand for several years and never faced such issues. Kindly advise for resolving the issue at the earliest.