Airtel — I have charged 9K for internet just for one month which i haven't used

Address:

Pune, Maharashtra

Airtel Connection (corporate – KPIT Technologies) & Relationship number is [protected]
Billing tenure - 2nd of every month to 1st of coming month.

Plan details -
INR 299 Monthly
1500 local calls
500MB data
And around 600 local sms

Issue briefing – On 7th April 2014 I have utilized 125MB of the provided data & suddenly on 11th
April 2014 it shown I have consumed 880MB data & again on 12th April 2014 it was shown that
I have consumed 1.1 GB of Data (sms were received postcompletion of my data plan). Airtel
provides me with 2G connection with a max speed of 70 Kb/Ps in which I cannot download more
then 100MB data in a day while as per customer service records I have downloaded more then 650 MB
in 3 days which is bizzarely possible.

My bill generation date is 3rd of every month but I have'nt received the bill neither its showing online.

Bill amount of INR9, 219.44 is just posted yesterday while the details are still not available.

There is a technical glintch as per my understanding I want it to be rectified at the earliest.

Please help me in this