Airtel — international prepaid roaming

I purchased a "one day" international roaming pack for usa from airtel which allows for unlimited incoming calls and 50 mb data. It seemed ideal since it ensures connectivity as soon as we land there. But, there is no mention on when this one day pack gets activated. It turns out that the pack i purchased got activated (And deactivated) before i could even land there. There was no mention of this by sms or other means. The customer service - when i could finally reach them after hours of trying and punching through multiple options -
Has been the most unhelpful and useless in this regard, not even able to tell me if the "one day" starts in the indian or us time zone. They simply keep parroting the 'it is for one day only sir' line.

I request a refund of the amount i paid (Rs 649).