Airtel — amount is being deducted from my airtel number

I did not activate any services. But they are deducting rs.35 from my account every week. My mobile number is [protected].
I am getting messages like thanks for choosing lifestyle service on your airtel mobile and they deducted rs.35 like 3 weeks already.
When i try to contact customer care every time my call is getting disconnected.
I want the airtel company people to return back my amount.