I recently bought a basketball for my kids from Shakti Sports shop in Akurdi(on Mumbai Pune Highway).
The next day, I saw that the ball had become a bit soft as it had let out some air. I filled in the air and went off to play with the kids. After 24-36 hrs the ball again let out some air and became soft. I realized that the ball was defective and had a puncture.
I returned the ball to the store, but they refused to replace it. They said that the ball got punctured due to usage and hence not replaceable. I told them that no basketball can get punctured in 2 hrs of usage! Also the air gets released very slowly after more than 24 hrs and the ball never goes flat - just a little soft.
It was definitely a defective piece and I am disappointed that the store did not replace the ball. It was extremely poor customer service and they have lost a customer for life!