Airtel — airtel international roaming for rs.3999 - unable to make outgoing calls

I'm unable to make any outgoing calls. I have activated the 4000 rs international roaming pack before coming to the us. But nothing seems to work now. Unable to make outgoing calls even to local us calls. Tried everything. As of now, able to only make calls thru whatsapp when connected to wifi. But i did not pay airtel 4000 rs for this! Need outgoing calls to go through asap!
May 8, 2018, 11:30 am et, new york, new york.
My airtel number: +[protected]