Flipkart — In their system my Ordered product is not showing

I ordered is received to me on 1 feb 2021, but there is a size issue so i want to return it. But they blocked my account.so i call to customer care they raised my return request but after 2days i again called them they told me wait for some days confirmation we will give you. But there is no any calls and emails.so i called them today 6 feb, 2021.they are saying the product is not showing in their system...How rubbish... although i told them to raise a complain whose

Complain id - IN[protected]