Flipkart — Ordered item yet not shipped

I have ordered iPhone 12 on 2nd May 2022 and today is 11th May 2022 but item is yet not shipped. The status in Flipkart order section is "Item waiting to be picked up by courier partner". The expected delivery date was 7th May 2022 but it is now changed to 13th May 2022. The iPhone was ordered for a special occasion on 8th May 2022 but it is yet not shipped.

Order ID - OD[protected]

I have registered a complaint in the Flipkart customer support on 3rd May 2022 but there is no update from them. They are saying that there backend team is working. But there is no resolution by the customer support yet. The expected resolution date is extending day by day. At first the expected resolution date was 7th May, it was changed to 9th May then 12th May followed by 13th May.

I have paid a huge amount for the item. Kindly look into the issue.