Timbl — I am complaining about the internet connection problem of ISP

I got a new connection of timbl and it's been more than 5 hours and it's internet service is not activated. The local service provider, the person who came for installation said that it will be started in 3o mins but nothing happened like that. Now I am trying to contact him but he is not picking the call and also the person who called me for the first time for confirmation is also not picking up the call. I want my issue to be resolved as soon as possible.