ITZ CASH CARD
Dis-activation of card before expiry

I had purchased ITZ cash card of Rs.1500/- from M/S.Chinmay, Dombivli in the month of february. On the back side of card it is clearly written as follows-

date of Mfg- 29/12

Valid for 12 months from first usage or for 24 months from date of manufacture, whichever is earlier.

I had activated the card on21/02.So the card should have been valid upto 21/02 which is a earlier date.

But the ITZ people have themselves decided the expiry date as 29/08 and disactivated my card. This has resulted me a financial loss of about Rs.900/- balance amount at the time of suspention of the card. How can they do this without informing the consumer?