Airtel — number not active even after a months follow up

Address:

Bangalore, Karnataka, 560072

I have a postpaid connection which is not active for almost a month now but they are making me pay money to activate it. Worst thing even after full payment even when i am not using. The connection is not active.

I am speaking to airtel 121 almost every single day and frustrated with their fake deadline with no resolution. How to reach the next level or teach them a lesson for these crazy support.