Xiaomi India — Delay in replacement of product

Website:

www.mi.com/in

I have purchesed two mi in ear headphone from mi.com, which had 6 months warranty but both headphones wasnt working after two months so i applied for replacement under warranty on 16th june 2016 (Hhin[protected] service order number. So they told me it will take 15 days for replacement since i tried to call the service center but they dont have any registred number to call so i called xiaomi support but they said it will take 15 days more so i waited now its been almost 2 months i havent recived any thing from them not even a call so can you help me they are just avoiding me right now and they are not replying to any communication