Amul / Gcmmf — Amul cheese

Address:

Surat, Gujarat, 395007

I bought amul cheese cube box from a supermarket. On opening the wrapper of the cube, on same day of purchase, i see fungus all over the cube. Fungus is not even on the small part. Entire cheese cube has fungus on it.
The expiry date hasn't come yet. It was packed on 13th april 2016 and the box says "best before 9 months" and it was stored in refrigerator at the supermarket as well. I want this issue to be resolved soon. I have paid money for it and i must get services in return.