Idea Cellular — was provided without any request

I have received following 2 msgs :
1. Thank you. We have received your request for service bluelima and it is being processed.
2. Your bluelima has been activated. Amount charged is rs 15.00 /- for 3days. Renewal charge is rs 35.[protected]@1week. To deactivate sms stop to 155223. Your balance is rs.9.63/-.
But as per my knowledge, i have not requested any of the above mentioned service.
Please look into this matter and do the needful.