Amul / Gcmmf — bad quality of amul taaza milk -seems something is mixed

I buy Amul taaza milk from a dealer who collects milk packets from a distributor but there is lots of sedimentation at the bottom of the utensil on boiling and even the curd forms a thick creamish bad odour and taste layer on the top-complained about this to Kolkata regional office of Amul but no solution found.
Further it would be better that supplies are done directly by the company and online purchases can be made in Kolkata as well like in Ahmedabad, Delhi, etc
Please get the samples checked and take action against the company -it seems the quality has gone down since last 20-21 months