Vodacom you breaking trust with your customers

Poor response from vodacom, I have being call by a vodacom agent to whom advised me that she is calling me due to a promotion to which I qualify for, she introduced the promotion to myself telephonically to which I have being offered a 30 GB for the same price of the 20GB deal that I currently have, so I asked her to upgrade my package. I then see my vodacom account went up by another R200 more. There was a sale manager to who i feel is covering the story here I will like the CEO of this business to investigate and give me what I have being promised. I am a customer of yours for the past 20 years. I am also requesting a copy of the voice recording.