Poor Service by Idea

I was having a Airtel prepaid mobile number what I converted into Idea. But after the conversion I found that the network coverage of Idea is pathetic and I don’t get any network at my home (@Malviya Nagar, Delhi) & at my office (@Saket, New Delhi). More over I outgoing is barred not due to negative verification by there executive on which I have every doubt about its truthfulness as the verification executive never responded no the number what he left at my door when he came first day without intimation me during office hours. After that I did lots of communication with Idea customer care but till now they didn’t give any solution to me.
I’m really feel cheated because of this unprofessional attitude of Idea personnel. They are hopeless.