The Mobile Store — Corrupted Memory Card Supplied with New Phone

I bought a Nokia 3600 Slide (Rs. 9, 169/-) from the Mobile Store, Opposite Lokmat Building, Nagpur on February 15, 2009 (Customer Number[protected]; Invoice number MH1245). I started encountering battery problems from the first day of purchase. I took my phone to the mobile store, and came back without any solution. The response by the Store Manager (Mr. Shridhar Naidu) and the sales person (Mr. Thakur) was that of complete indifference and ignorance. Later I found out that the real problem was not with the phone but the memory card they gave me with the phone. The memory card was corrupted and they were not ready to accept the fact.
How can a brand new mobile phone, with a memory card, have viruses? Its a clear matter of cheating, as they supplied me with a used and old memory card (The memory card is not a part of the sealed company-provided box).
The behavior of the Stores Manager and the sales person was very humiliating and I being a woman, found it all the more inappropriate.
I request the the Consumer Forum to please take action against the concerned persons as their behavior has caused me enormous inconvenience and mental harassment since the last full week. I do not want anyone else to go through this kind of inconvenience.