Airtel — unable to use sim abroad despite activation of international roaming pack

Address:

560077

Was travelling abroad for 10 days, called airtel on 20/9/2018 at 12:30 near indo nepal border, requesting for the activation of international roaming, customer care people told charges as rs.2999/- for 10 days and i received message about activation. However from that moment i couldn't use my mobile for making calls or net till 28/9/2018 until i entered india. When contacted customer care and explained the problem, they told we have activated but you have not used, however when i explained that i always got outgoing calls barred message, they have sent me a message that the service will be now deactivated. I am requesting airtel to look into this and not charge any amount for not providing service