Unauthorised upgrade

<p>Sometime last week I received a call from one of your accredited agents (Mondo) and they offered me an upgrade on my data line ( ********** 287). I declined the offer but today (24/10/2016) when I try to cancel my contract with Vodacom, which is currently on a month-to-month. I was reffered to Mondo and they are telling that I upgraded last week on 20/10/2016. The agent is telling that I upgraded to an iPhone contract and according to the system it will be delivered to some address I dont even know. This is clearly *****!</p> <p> </p> <p>The reference number I got from Mondo call agent regarding all this mess is 66190. May you please fix this because I am not going to pay for something I did not agree to.</p>