Airtel — Network No service

Iam using airtel network for more than 8 years.Currently i moved to UAE during the time i recharged International roaming pack for 1 month and i used for 1 month. But i have main balance in my account after some days there is no network for the airtel no.Iam not able to call including customer care.For that i recharged International roaming pack again for 1 month and i have main balance also.But i dont have airtel network to use this pack.I tried everything but no use.