stale butter

I have purchased 500 gm Amul Butter which was packed on August-2009. It has a very bad taste and foul smell and it was pink in colour. I have complained to Amul customer care Dept. but there was no response. Moreover the executive Mr. Pankaj was highly rude and would just postpone the issue. Finally when nothing was done, they didn't even care if the matter goes on the consumer forum.
I had no other alternative but to file a complaint here.
Please, kindly look into this matter and do the needful.
My phone no. is 9987034585
my email id is shiral23@yahoo.co.in