I lost the card through which i made the payment. How do i pickup the tickets?

BookMyShow is sorry to know about that. You would need to carry a letter from your bank on the letterhead stating that you have lost your Debit/Credit card along with the transaction statement stating that the tickets for the event have been booked by you, a valid id proof of the card holder recognized by the government and the SMS/email confirmation.

This is mandate as a part of security check in.