Charged for unwanted service

I upgraded my contract approximately June 2015. I specifically said I do not want Vodacom insurance as I use my own insurance company. I found out that they charge me for insurance every month, but it does not state insurance, it states Cell Band 5. That is the reason why it took me a few months to find out that they are charging me for insurance I did not request. I phoned and sent an e-mail regarding the matter, but do not get any reply. They expect me to take my time and drive 100km+ to a Vodacom store to sort out a mistake made by a Vodacom employee.