Flipkart — Refund for the item missed in delivery

I have ordered naturewell chia seeds of 2 qty
Under order id - od[protected].
But only one got delivered on 28 june.

I raised a ticket on the same through the app
I dint get any proper resolution instead ticket got closed couple of times

Then i reached to customer care through mobile after multiple calls and waiting for 3weeks
They rejected refund for missed item.

Please look into the issue