Airtel — unusual recharge of internet

I want to say that from 10 nov i ok the 3g balance in my offer of airtel. From every sunday 49 rupees deducted from my main account balance. Without my permission pack was renewed and rupees deducted from my main account balance. I also checked that no service is active. At the last i want to say that stop this deduction of rupees from my main account i would be grateful to you.

Thank you