Big Bazaar / Futurebazaar / Future Retail / Hometown — safari trolley bag

Address: 700001

I have purchased a big safari trolley bag from your big bazar in kolkata at dharmatalla near (Esplanade) on 04/12/2018 after making a payments i want to exchange the product because it was too big so i want to have a medium size but your sellers make me denied that after billing they cannot exchange the products now tell me what should i do.

My name is ujjal kr mondal
Email:- ujjal. [protected]@gmail.com
Mob:- [protected]