Airtel — incoming and outgoing calls, message sending, internet

2 months ago i buy a airtel sim card, i had no problem in any one facility. But from last 2 week i got a problem with sms, internet, incoming and outgoing calls i mean all the facility. I tried to call customer num. I talk with them, they told me that in your area site is being under construction. There are three towers in our area.-vyara dist tapi. These is all indoor problem. Even one signal isn't come. If there are theree towers atleast incoming and outgoing calls should work.