To address concerns of consumers in this regard and also to prevent accidental activation of value added services, TRAI has issued directions to service providers, from time to time, mandating them to ensure that no value added service is activated without the explicit consent of the consumers and also prescribing therein the procedure for obtaining the explicit consent of the consumers.
TRAI has recently issued a direction on to all service providers that in all cases of activation of value added service, the service provider has to obtain a confirmation from consumers within 24 hours of activation of value added services through SMS or e-mail or fax or in writing, failing which the value added service shall be de-activated without any cost to the consumer.
So now you know how to get your money back when VAS is activated without your permission. For more information read this.