Nothing done by Vodacom after reporting

I realised that one of my accounts started to get very high. I went to the Vodashop and they told me that an upgrade was done on the number. I never did an upgrade on the line. The person that upgraded the line took an iPhone on my contract and ran up my account. I only use this account for data no calls. I logged the call with Vodacom and submitted the documents they requested. After 20 days when I called to follow up they said nothing has been done on this issue. Then the transferring started. From one person to the next and every time it ends on the customer feedback segment and then nothing. I am so frustrated. I suppose I need to open a case of ***** or something against the CEO of Vodacom as they allowed someone to upgrade my account without confirming if it was me. Why do we RICA? The phone was not even delivered to my registered address on the Vodacom system.