Xiaomi India — redmi note 4, service center denied warranty.

Address:

New Delhi, Delhi, 110005

Mi service center delhi, denied service warranty of my phone, when i submitted device it was working except network issue, afterwards they returned my device by saying that its out of warranty just because there was no warranty seal placed. And now device is not working anymore.
After a month of purchasing whole motherboard was changed by service center. (I guess they forgot to put warranty seal or this guy at service center tampered my warranty seal)
I have been using mi devices from last 3-4 years or may be more and now am really annoyed with this kind of behaviour of service center.