Reliance Fresh — overcharged than mrp

Address:

Pune, Maharashtra, 411046

I purchased pick n cook gram 500 which was priced rs.57 but i was charged rs.62 for the same. On raising the issue to the cashier she said that she scanned the barcode but there is mismatch in printed price and price depicted by barcode so you will have to pay according to the price on you bill. As my purchase was billed so they rejected to take back the item. So unwillingly i was compelled to pay them the extra money. This is the complete violation of my consumer rights. Please look into this matter. Its not about only rs.5, its about violation of my rights as a consumer and the mental stress i am going through.