Gokul Milk — Milk curdled before expiry date

I purchased 1 litre Gokul milk on June 1, 2024 and on the same day I boiled it, however, the milk was curdled immediately. This has happened second time in a span of one month. When I requested shopkeeper to take the milk back for raising complaint with the company and refund my money back to which he denied stating that company doesn't take it back. This is very wrong that consumers are paying price for Company's faulty products. I need immediate resolution on this issue at the earliest.