Punjab National Bank [PNB] — regarding redemption of pnb rewardz points before closing of the rewardz programme.

I had redeemed 1740 pnb rewardz points by ordering a item on 27.09.2018 as pnb was repeatedly sending the messages to redeem the points. It was printed on the generated receipt that 'your merchandize will reach you in 15 business days' (Receipt attached). But till date item has not been delivered. On inquiring pnb customer care has informed that the rewardz program has been closed on 30.09.2018. But i had redeemed the points before closing of the program and receipt also provided to me against this order. I have communicated to pnb officials several times through emails and over telephone but the complaint has not been resolved till date.