Unable to cancel Vodamail.

I am an Vodacom Pay as You go customer. On 26th May I received an sms stating I would be charged R29 pm for Vodamail usage, a service I do not use and an amount of R29 was deducted. I have been trying since to have it cancelled by visiting a Vodacom branch and using the contact us unsuccessfully. The 082-135 does not have an option for Vodamail and Vodacom's Tobi states I need to be a Top Up or contract customer. I finally managed to get hold of an agent but she was unsure what to do, finally asking for my details and telling me a technician would call. Why would I need a technician to assist in cancelling email vodamail ?