Xiaomi India — Mi 4i mobile camera problem

Address:	380015
Website:	www.mi.com

I give my mobile on 2/5/2016 today it take 1 month but they not repair my phone and do not give time how much time taken, my job sheet is i give them and they did not return it me back, there lots of phones of miss by then there no system follow on MI service bodak dev.

please give proper solution they are lots unrespect customer and staff have less knowlagr and give unuseless ans when we ask them