[Resolved]  Airtel — unable to make a call even with a valid unlimited call plan

My unlimited will expire after 13 days. Still i'm unable to make a call. When icall someone, it says 'u do not have sufficient balance to make a call'. I've tried shifting network type, also i tried to make a call with mobile data off but still not able to make a call. It is very disappointing to bear such problems. Pls fix this issue as soon as possible.