POOR SERVICE AT VODACOM

I have been paying for a Vodacom contract for the last 8 months that does NOT belong to me, and I have never signed any contract that legally permits Vodacom to deduct a monthly payment from my bank account for this service. I have reported this as ***** on the 21 March 2018 (at Brookly Vodacom) and have not heard anything from Vodacom SA since – despite my repeated enquiries. To my knowledge a contract has been added to my existing Vodacom profile on the 31st October 2017. I have sent an affidavit to their ***** disputes on 10 June 2018 - again, no acknowledgement of my e-mail. I would appreciate if someone can point me to Vodacom's legal department.