Vishal Mega Mart — Breach of contract

Good evening sir/mam,
I have purchased magnum jumbo 59 CM trolley case from vishal mega mart store- crossing republic, ghaziabad -123456. As the trolley is not of our required size we tried to exchange the bag from other vishal mega mart store which is situated at hari nagar, badarpur-110044. But the store manager and store keeper refuse to exchange the trolley case. But on the vishal mega mart bill its clearly stated that we can exchange Or replace, at any store in all over the india. It's completely the case of breach of contract and this kind of behavior is not expected from such a renowned organization.
Please do the needful in this matter I request the required action to solve the issue.