Vodafone India — caller tune activated without my consent

I received a message that a caller tune has been activated on my number but i didn't want it so i sent a message to deactivate it. Surprisingly i received two messages first one stating the deactivation and a second one saying caller tunes will be activated within 15 minutes and rental of rs.39 for 30 days have been charged
This is no way to cheat a customer, i want my money back.
Even a few months ago i was cheated like this with a game subscription, this things can't go on again and again.