Flipkart — OD[protected] not delivered not refunded

The Order OD[protected] was supposed to be delivered on 11th of October 2023 and it was not delivered but marked delivered. When I raised the complaint to their customer care, they were handling it abnormally slow and on 15th of october, one delivery executive have called and told that the return is initiated for refund. But when I check the same, she have initiated for only 1 item and remaining 14 items were not marked refund. I need refund for all 15 items as they were not at all delivered but unable to raise return request myself. Hence, I need help in getting the refund from Flipkart.