Airtel — deduction from main balance without my concern

Address:

Ernakulam, Kerala, 682028

I am using an airtel prepaid connection, mobile number [protected].
On 09/03/2018 i received a sms mentioning that an amount of ₹ 35 has been deducted from my main balance without my knowledge or permission.
The message said that the amount has been deducted for activating vemer service which i have never applied and that too this amount is for just 7 days and after that they will continue doing so.
This is cheating and imagine the amount airtel will be collecting just by multiplying the number of consumers.
I would like the concern authorities to please look into this and do the needful so that the consumers get their money back at the earliest and these sorts of cheating never happen again. P