Flipkart — Myntra gift card showing card has been deactivated. Without any use

Address:

Maudaha Hamirpur Uttar Pradesh

Hi, i purchased myntra gift voucher from flipkart.com and after two days when i steps further to redeem it. It is showing "card has been deactivated". My card value is 1000*2. When i called myntra.com customer support, they were telling we can't help go to flipkart.com.
When i asked to flipkart.com, they were telling go to myntra.com and no one is taking responsibility. They are cheater. Flipkart and Myntra both does not care about customer money which he earns after a hard work.
Worst experience and very bad services. Seriously very disappointed with both. They both lose me as their valuable customer.