Domino's Pizza — package didn't arrive

I ordered from online Domino's on 2nd may, 18- 2 pizzas worth 455/- from online Domino's order. The order never arrived and I received the delivery message. On complaining the same, the customer care executive said the refund has been initiated and the amount will be processed with 7-10 days. But now even after a month there's no updates from Domino's. Continuous follow up with customer care also didn't help in any way. They are just avoiding the matter. Kindly check this Matter