Saravana Stores — Regarding damage in the product Brass Godavari Gundu

Recently we purchased a Brass Godavari Gundu from Super Saravana Stores, Chrompet after returning to home we thought we could use it for drinking water so we removed the price tag and washed it thoroughly and poured water into it started leaking Initially when we bought it was covered and under the lights we could not see the damage properly since we purchased more than 10 items on the same day for about eleven thousand rupees we somehow bought it to home and while using we found it to be damaged but when I went for an exchange request on the next day they were not willing to exchange and was a harsh response from the official as it was not acceptable. Kindly address this issue since the Gundu rated around 1500 rupees in Indian currency