Amul / Gcmmf — Bad smell in amul masti dahi

Address:

10,Riddhi raw House, Opp. Pleasure club, Ghuma-manipur road,, Ghuma

I bought amul masti dahi today. It is smelling very bad. I am regularly using amul gold milk. From last one month atleast once in a week milk is also smelling very bad. It test like some chemical is added to it. We are purchasing amul product from umiya dairy parlour, dental college road, ghuma. Store owner is giving us fresh product. Do needful. Amul is manufacturing best milk products. Don't compromise with quality and do needful. Please confirm such products are replaceable or not?