Airtel — Billing for Unused Data usage and Call

Address:

Bangalore, Karnataka

Hi, I activated my Sim card on 04th Dec 2012 with 249RS corporate plan and 98Rs Data plan for 2GB.
I haven't started to use that data storage.
On 5th Dec 12 07:55pm I got the message as below:
Usage for your airtel mobile [protected] till 04th dec 12 is reaching your credit limit of Rs500.. Please pay rs 200 s interm payment for continued services.
So i got the very bad and unreliable feeling on airtel. So you have to clarify it. Customer not responded properly.And i would like to disconnect my number.