Airtel — airtel hotspot not activated

Address: Gurgaon, Haryana, 122001

Website: Airtel

I've contacted airtel customer care to activate my hotspot. I've paid 3000rs to get the connection on 11th dec'17. However the device is not activated yet, and customer care is not responding.
This connection was taken due to certain emergency, while they have taken the amount but services can't be used. Apart that the dial time takes long time and i m not able to reach their customer care guy.