Airtel
Charged often for a no use service

Hello i am kannan. i have been recently receiving messages from 64611020 which says "thanks for using (subscriptions, textbasedservices) subcription service on airtel wap. you've been charged rs20. enjoy:?? gclub.in" and being charged Rs. 20 often. my mobile number is 9894735467. please unsubscribe soon. or please give the instructions to unsubscribe thanks