Airtel
Receiving unwanted messages from AD-54321 and my balance is being reduced for it

My Name is johney (Mob no 9199694802). I am receiveing the message from last five days as "Thanks for downloading Hungama " I really donot know why this message is coming. Request you to help me to avoid such irritating messages.

everytime i recharge, the samething happens... i want to unsubscribe and want my balance refunded... Hope u look into dis matter...