Vodafone — Callertune activation without my permission

This has happened many times. Vodafone sets some callertune without my permission or any action and deducts amount for it. For now, it was less but today it deducted 99 Rs. from my account which is very unnecessary and problematic.
Please look into it as soon as possible because this is a big problem in your service and I'm not the only one who has had this problem.