Flipkart - Gift card balance

I was having around Rs.**** Flipkart balance in the gift card. Suddenly when I checked it was showing me only Rs.***. When I contacted customer care they informed that it has expired and I won't be able to use it.
As far as I know, they will be sending email or message notifications before * week or so if the wallet balance is going to expire. I have not received any email or message notifications regarding the same or else I would have utilized it.
After raising this complaint they took around ** days and now they are saying that they can not do anything regarding this as the gift card has already expired and I have lost my Rs.****. Being a customer this is not at all expected. They have to send a notification if it is going to expire otherwise how we will remember the dates when it is going to expire. Generally, for advertisement, they send **** messages or emails for their promotions and in this case when they should send they are not sending any such notifications. Hoping for some resolution here.
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