Airtel — airtel broadband band connection delay

I applied for airtel broadband connection through website. A sales person called me for connection, i have given appointment. The next another person came and collected the proof, and asked me to make payment immediately through online, he told me that within 24hrs installer will come to my home and install the broadband, after that nobody came. I called to that sales person who called me.in the beginning for connection. But he was not picking the call. I tried more than 100 times. Then the person who came to my home to collect the proof, i tried him, he was also not picking the call. Now i am helpless, i have their names and contact numbers and my application number.