Myntra.com — Myntra not sending product not refunding amount already paid for it

I ordered a Myntra gift card worth Rs 2, 000 from their app (Order ID # 1186368 [protected]). They are unable to share the pin to use the gift card nor are they refunding this amount. It's been a week of following up on this issue and their customer care keeps wasting time and are clueless how to resolve. They know they haven't solved the issue and asked for a 2 day extension today but have gone ahead and marked the case as resolved. I have tried to explain the issue over multiple calls, emails, and Twitter. But they are simply not resolving the concern.