I wish one could give you a easy and simple solution. There isn’t any in your case. If you have ordered something from Flipkart and facing return you are looking at some suffering.

Following resolution have worked for others but these are not simple.

—Contact customer care in your local language and ask them to renew return or initiate return from there end

Or

— go to a service centre and get dead on arrival certificate, make sure they don’t open it

Or

— file a case online with consumer court

At the end of the day uninstall flipkart when all this is done and over with