Airtel — free calls and internet stopped for rs. 899 recharge on 26 oct 2017

I recharged with rs. 899 on 26 oct 2017 and the recharge benefits were unlimited local & std calls with 2.5 gb data per day for 84 days. From today morning my calls and internet usage are getting charged. I approached to the airtel store at sector 5, salt lake. The representative was unable to tell me the exact reason, she was telling some terms and conditions which i challenged and she called a person over phone for details. Finally she told me that she will call me after getting the details within 7 pm today. As expected, i did not receive the call today. Attached is the ticket i had today in the airtel store. I would like to know what went wrong, what are the exact terms and conditions for my recharge of rs. 899 on 26 oct 2017.
I was in roaming for 1 week and often i used to get a message that outgoing was stopped that time, not always though.

Please let me also know the next level of escalation if i don't get a satisfactory response.