Big Bazaar / Futurebazaar / Future Retail / Hometown — regarding carry bag

Address: Near Shankar Mandir , Gowtham Nagar Opp IIT Main Gate Powai, 400076

Dear sir,

On monday i visted big bazar at r city mall ghatkopar bought some items.
At the time of billing they charged rs. 25/- for each bag and one more thing the bag is in small size so that they think customers will ask for more bags it's such a rubbish thing.
My question is this why should a customer pay for carry bag? Even after paying overcharge then also getting small size bag.
It's there responsibility to ensure better service to the customer they cannot expect the customers to bring bag or carry at hand. No shops should charge extra for plastic bags, as we are anyway paying so much tax and this is free advertising for them. They are promoting a product and i will be carrying their advertisement wherever i go and still be the one paying for it