Flipkart — Non refund of money and threatening emails

Address: Flipkart Internet Pvt Ltd Block B (Begonia), 8th Floor Embassy Tech Village, Outer Ring Road, Devarabeesanahalli Village, Varthur Hobli, Bengaluru

I have been a Flipkart customer for more than 8 years and have been struggling with my last order number OD[protected], placed on March 4th with a delivery date of March 6th. Neither the order was delivered nor the money was refunded despite multiple complaints raised and multiple follow-ups with Flipkart. They keep on sending emails with a promise to solve the issue in a couple of hours, but nothing happens.
When I contacted the call center on April 7th to inquire about the status of my refund, I received an overwhelming 20 feedback emails within just five minutes threatening me.

On April 8th, I received 4 missed calls from Flipkart numbers[protected] and[protected] from 6 pm to 6.16 pm. I understand that they have a policy to close complaints after three unsuccessful attempts hence, the call center representative was making missed calls to my contact number.

I still request Flipkart to refund my money asap and cease all miscalls immediately.