PVR Cinemas — Pvr gift card showing as insufficient without any bookings

As I was booking ticket for the movie VIRUMAN for 9:35 Am show in vaishnavi shapphire mall, the total payable amount was 579.52 i choose to pay through my gift card which is of 500 it asked for the card number and the pin i added it and even verified it as I clicked pay the pvr page reloaded and there was no transaction and the card was insufficient balance, kindly explain me how the amount is been deducted if the tickets are not booked, kindly refund my amount so I can enjoy my movie experience.