BSNL PANTEL TABLET T-PAD IS701R — Not Working

Address:

Hyderabad, Andhra Pradesh

I received BSNL PANTEL TABLET T-PAD IS701R on 28/01/2013 , purchased from Naaptol Website but product not working as from starting its hanging and when I gave complaint on this the custome executive took complaint and gave the complaint no. and said that one agent will come to collect the tablet to get service in noida means this tablet will be sent to noida from hyderabad.
And first time one agent gave me the service address and I went there but the thing is that their people did not give responce properly said as we are not providing the service for BSNL PANTEL TABLET T-PAD IS701R ..etc..

Now I am really fed up with the service.
Everytime I have been telling as our agent will come and collect the tab and will be rectified.

Now tell me what should I do ?????????????????????