Flipkart - Marked Replacement Delivered without even calling me

I have placed * Atomberg fans delivered to me on **th March out of which * had minor external damage so I asked for the replacement and it was accepted with Replacement ID: ********************. But the replacement product was marked delivered by the delivery without reaching out to me at all. I tried to reach Flipkart customer executive again and again and they kept telling me that they have raised the issue and team will get in touch with me and I have been kept on hold for more than ** minutes(though executive asked me to put call on hold for a minute). I waited for an hour but I was on hold for that long. I gave up, now I don't know what should I do.