Sony India — not giving phone on time, nor telling how long it will take

Address:

Erode, Tamil Nadu

i had given my mobile (xperia z) on 12th of July. they told it will take 7 days. today its 19th day and they haven't given the phone yet. today i called them up.. a lady picked up the call. She told she will call back in 5mins n=and never turned up... is this the way they treat customers?? I kindly request you to replace my phone . i dont want this headache