Paytm Mobile Solutions — Regarding replacement of refurbished product

Address:	Chennai, Tamil Nadu, 600089
Website:	PayTM

Received defective mobile phone, mailed many times for either replacement or exchange but they seemed not to pay any heed to my requests. No proper response of my mails neither they are sending any one to collect the product instead suggesting to visit nearest service center. Worst site i have ever experienced.
As well as when calling them for assistance none of the provided numbers are correct. Either it says "number does not exists" or it says " please stay on line" and then it gets disconnected. No professionalism is maintained. Total fraud site. Moreover, I have raised a replacement request on the website still they are paying no attention.
I need my product to be replaced else to be exchanged asap as because last date for replacement is nearer.