Airtel — deduction of main balance without prior information

Iam the customer of Airtel for the last 10 years.But now iam unhappy with the airtel.Recently i have a Rs.32 balance in my account but on[protected] an amount of Rs.23 is deducted without any information.So I Called to the customer care they didn't give any information and call can be connected to Supervisor(Mr.Rajesh) .He is also very rude and worst behavior with the customer and suddenly the cut down the phone call.And day after tomorrow again i call to customer care now this time another Supervisor(Mr.Naga raju), he is also not given any information.Immediately i want refund my amount or other wise company has to take action against the both supervisors.Thanking You Sir.