Vodafone — without information they cut the money

I received a call from [protected] regarding caller tune, i did not asked for caller tune but they have sent a message saying that
1. message " Caller Tune has been activated on your vodefone mobile phone. Rs. 30.0 will be deducted as monthly rental." and 2. message "You have successfully activated yout callertune service. To find the song of you choice sent <song name> to 55655."
3. message " Ninna Nodalento Mussanje Maatu has been sent as yout caller tune for 90 dats for all"

after receiving 3 message i had sent a message to 56789 as " please deactivate never asked for it"

but they have sent a message "Hello! You have entered the worng keyword. Please enter the desired keyword and SMS to 56789"

during this i lost all my prepaid money. for one message and one calle it lost more then 9 to 17 rupees. Please without our permission they should not activate any caller tune. please replay back to be as soon as possible.

thanks