https://www.desidime.com/discussions/seeking-advice-sbi-prime-credit-card-pizza-hut-voucher-redemption-process?page=1#post_9560253
Bro goto any pizza hut store and say that you'll be paying via voucher. Then dine at the outlet and while payment share voucher. They will redeem . If they deny say that you have already used earlier a few times.
They have a provision to enter gift card in the POS machine. Happy dining