Reliance Trends — Exchange of clothes

Address:

Jhabua

I've purchased a sweatshirt for my nephew from trends jhabua but it was short on size so I exchanged with the new one. But at the payment counter the supervisior took my original bill and said they will not give the original bill since I exchange the product. I've done exchange in various shopping outlet including trends indore but never the supervisior kept the original bill. When I asked about it the supervisior said its store policy. So how come store policy is different in two cities.