Xiaomi India Customer Care — Pathetic service at Koramangala (Bangalore)

I gave my Mi4i mobile on 20th Jul'15 to the Koramangala service center for a speaker issue vide work order[protected]. It's been 25 days that i have given for repair and I have still not got my mobile.Every time I get the same response "Work in Progress". No body picks-up the phone at this service center. The people sitting at the service center does not have any clue why they are sitting there. They will call you saying it will be ready next day. And when you go there it won't be ready. I have never come across such a lousy service center. If Xiaomi is serious about business in India, then they should look into improving the service center's.