Gokul Milk — Complaining on spoiled milk

I bought 5 litres of gokul milk on 2nd May on occassion of EID from a local distributer. The person explained that its a fresh set of milk cartoon and is of good quality. However, soon as I came back home and kept the milk for boiling, it was all spoilt. I immedieatly complaint to the distributer but he did not help, nor he is ready to take this complaint forward with his superior. Please can someone help me. I spent my hard earned money and also want to check the sincerity of the brand. For anything related, please contact on [protected]@gmail.com