Vodafone India — vas fraud

I have been using vodafone mobifi ([protected]) since, last year. When i went through my bills, i realized i have been fraudulently billed for vas services, since jun 2018 - dec 2018. I have not activated these services. When i contacted vodafone, they replied in their typical 'cut and paste' way, that the amount will be reversed to my account. Only dec's bill has been reversed. (Complaint no;s[protected] and[protected].)

I would like to know, how vas was activated without my permission and knowledge and how can vas be activated when, the sim in inserted in the mobifi device?

Please reverse all charges related to vas and stop such cheap practices, if you are really a standard company.