Vodafone India — deactivation of caller tune

Hi, i m kingshuk nag. My mobile no. Is [protected]. On 03/11/2017 a caller tune was activated in my ignorance.

I did not want to activate any caller tune. But a caller tune is activated anyhow & deduct rs. 30/- from my talktime balance.

I want to deactivate the caller tune which is activated without my knowledge.
Refund rs. 30/- for this activation to my phone.

Please take necessary action.