Airtel — unable to recharge after postpaid to prepaid conversion

Address:

400060

I am being with airtel from almost 5 years always facing network issue due which i converted my postpaid connection to prepaid to unnecessary paying off.
But after converting i am unable to make any recharge and due which unable to make any outgoing call.
Airtel should change their slogan "india's fastest network" making fool to entire world.

Customer care executive unable to find correct solution as per their end number is functioning smoothly.