Airtel — premium number call charges

Address:

Mumbai City, Maharashtra, 400020

I called on toll free number and they hav charges me 40 inr without the tariff charges details but according to trai notification dated 6 th january 2012,

"in order to ensure that a consumer is aware of the charges payable for availing such services, the regulations prescribe that in case of prs, the consumer should be informed of the charges for such service before materialisation of the call and in case of value added service, he should receive, before activation of such service, information about the charges, validity period and the procedure to unsubscribe from the service."
But flatly they didnt.