Airtel — bill on higher side

Address:	110015
Website:	airtel

I have recently converted my prepaid mobile number to postpaid due to non cooperation of airtel people, during conversion they provided me bill details which will be applicable to me after using one month they have raised the bill amount to double and that too without usage now customer care is also not picking up the call and help centre at patel nagar is also not responding. This is what Airtel is serving to its customers? I want airtel to send a revise bill for the number [protected] as son as possible