Airtel Mobile - Prepaid — Balance Deducted.

Address:

Pune, Maharashtra

I am Venkat and i have Airtel prepaid connection (Cell Number +91-[protected]). My complain is against deduction of balance from my prepaid mobile connection.
I received an SMS stating " you last call charge is rupuees 1 "
but i did not made any call, same message i got contineously two days, i called to customer care,
customer care executive told that i have activated to for alerts, but i have not activated any valude added or service alerts. With my authentication how should they activate any such alerts.
Please do the needful.