Red Tape — Red tape denied to replace the flip flop, even if the product is under 45 days warranty

I’ve purchased a flip flop at 12th (February) after 30 days it got bubble in the patching and now it is completely torn off, so today at 24 (March)
Almost after 40 days I went at store to exchange it as I’ve still had 5 days left for my warranty to get over, store still had an excuse that they can’t do that coz it has a flat discount.

And I do remember when I was purchasing that product they said, if anything happens such as manufacturing default you can return the product in the 45 days and i still have the bill intact that says return the product if there’s any manufacturing defect, even after promising they denied to exchange it.

Dear
Red tape if your reading this please tell your sellers don’t do such false marketing to sell your product, if you can’t keep your word just say that there wouldn’t be any exchange or return simple.

Bought form.
Kichha, Uttarakhand.
Store Phone number[protected]
Mirza international LTD