Airtel Internet — Overcharged bills

We had requested 1st by telephone on 6 August to have our plan changed from 1299 Business Combo to Impatience 1299. We were informed by the Airtel staff that since their system was being updated we should email the request to “wecare.[protected]@airtel.in”and assured us that after this our plan will be changed to Impatience 1299 within 48 hours. Following the telephonic exchange, we sent an email dated 6th August for the same to change our plan

At this point we understood that Airtel will do the needful and hence started using the internet as per the new plan Impatience 1299.

On 14th Sep 2010 we have received the bill amounting to Rs 14, 509.84. Upon further investigation it was noticed that Airtel failed to change our plan from 1299 Business Combo to Impatience 1299. We have written to Airtel customer service the same day informing you of the error with a request to rectify the same. We received an email from Airtel explaining that Impatience 1299 is not applicable to our account.

We were not told anything to this effect when we made a plan change request on 6th August. Even after sending an email for the same we were not intimidated that the plan will not be applicable.

Now, on 17th Sep 2010 I get an email from Airtel saying that they never got any email from us. What is next - will they delete the telephone conversation as well?