Xiaomi India — Xiomi headphone replacement

Address:

Patna, Bihar, 800004

I'm here to complain about the replacement of my headphone, which I brought sepratly from flipkart for 999rs. After 3 month o[censored]se it stoped working.
So I submit it for replacement on 2jan 2016 on xiomi service center, Patna.
Since then I'm just waiting for d product.
I visited @ service center 2 times in gap of 20- 20 days. they don't have any update On my complaint, when I tried calling them they never respond.
Its been approx 2 months.
For further information I m attaching my invoice & service job sheet