Airtel Prepaid — service /balance

Sir,
i (k.gideon)using the mobile no:[protected],
have a problem of deduction of Re1/of balance from my account every time i switch off & switch on my mobile.i use a NOKIA N70 mobile i switch it on &off when i get stuck with the appln device.this has been going on above one month but some balance is returned back when i called to the coustmer care .but a permanent solution could not be found . i have a free joke pack subscribed on 27/11/08, which i don't get, hello tune for 7 days, beep balance running in my mobile service. i request you to do the needed help of serving the problem .thanking you in anticipation of service