HTC — Htc service centre replaced my phone and gave me another phone of same model

Address:	110092
Website:	They have replaced my phone and gave me broken phone of same model

Htc service centre replaced my phone and gave me another phone of same model.
I gave my phone for software update and they kept me waiting for 30 mins but refused to gave my phone back on same day, saying that there is further problem in the handset. I collected the phone next day and they had replaced it with different handset. It is highly unacceptable!!!
You do not expect such things from authorized service center.