[Resolved]  Airtel / Masti Pack — deducting money without asking from prepaid card by "item"

inspite of repeated complaints from 26/10/2008 the call centre of "Airtel - prepaid card" is unable to deactivate masti pack facility from my mobile no. [protected] . However, i haven`t activated/ requested for the same, & without asking me, my balance is also reducing, which is totally illegal. I have stored all the mgs. & complaint ref. numbers.
i have sent 3-4 SMS also " UNSUB MASTI to 53030", in response i am getting msg " sorry you are not registered for this service". if I am not registered than why my prepaid balance is reducing time to time. it means some body of your call centre is doing purposely for personal interest. please investigate the matter & accordingly stop the Masti pack facility permanentely And arrange for credit of my unauthorised deducted charges.