Brand Factory — charging rs.10/- for paper carry bag

I purchased 2 tops from brand factory in begumpet branch of hyderabad. At the time of billing, they asked me if i want a carry bag. I agreed and to my surprise they charged rs.10/- for a paper carry bag with their brand name. I argued with them saying that they should provide carry bags for free since it has their brand name over it. They refused to provide free carry bag. Since i cannot hold the apparel with hands till my place, i had to pay for the carry bag with great depression.
Please compensate for my mental agony.