Mi India — Refusing to provide motherboard replacement paper

Address:	Kolkata, West Bengal, 700152
Website:	www.mi.com/in/index.html

On March 31 '16, my Mi 4i phone's motherboard was replaced by Mi Authorised service centre, naming Infotel services, Hazra Rd, Kolkata ph no- [protected]. They wrote new IMEI No on the xerox copy of my invoice, and stamped and signed on it. I'm also attaching that scan copy. Now, when im claiming to Mi Protect-insurance company, they are not validating it, they are demanding Replacement paper.
I visited Mi service centre after this, they are saying that this is my replacement paper, which i have attached.and mi protect is not claiming with that paper.