Vodafone India — value added services

For the past few months, every few days a value added service is added to the number without authorization. I need to keep calling in to say i do not need any vas but it keeps happening again. If i call to deactivate the vas, the balance that has been deducted does not get reimbursed as well. I've never had any issues with vodafone in the past but this harassment needs to stop.