I never requested for that stupid ringtone

My name is Sandeep , Pune and cell number is Recently my account balance was reduced all of sudden. I was surprised but later on I came to know that my hellow tune is activatated from your side. I never requested for that stupid ringtone then WHO DID THAT???? Please look into this on priority basis before the things go worst. I also tried to contact to customer care on 4444 but daytime it doesnt get connected and in nighttime the IVR says your number is invalid.
Please do anything and put the balance back to my account.