Catwalk — Golden flat bellies

I purchased Golden Flat Bellies from Reliance Store @ GT Central Mall, Jaipur sometime in June. I could not use it for a couple of months post purchase. As it is made of leather the sales staff suggested to buy the fit size. They said that with time it will get a little loose (true as it happens with most of the leather footwear). But to my astonishment its even getting shrunk after every use. Seems to be some weird problem with the product.

Please suggest what can be done.

Regards