Airtel — amount have been credited but not reflected to my number

I have credited for unlimited pack through online airtel recharge my amount have been taken from bank and I have got confirmation message about your number have been credited with rupees 448 but when I tried to make calls or send messages I received a message that my balance is 0 you are unable to that I have complained to customer care they told that they will resolve but nothing changed what kind of new scam is airtel trying to do I thought this is the best network but I think now this is a just number one scam network