Airtell
Deactivation of wap conection

I m getting a message daily from 64611020 as

thanks for using (subscription, text based services) subscription service on Airtell Wap. You have been charged Rs 20/- Enjoy http://gclub.in

i m losing Rs20/ per week for no benifits and site mentioned in message is also not working.all this is disgusting n unbearable.customer care peoples are also not supporting in right way.

i want to deactivate this service buy tonight. Kindly deactivate this service.

My cell no is 919998989517.

i don't want it any more please.