Vodacom ****med me

On the 20th of December, vodacom salesperson called me. I was told that because I have been with them consistently for more than 11 years, they would like to thank me with a free cellphone. Because of my fear of being ****med in december I refused, to which the salesperson assured me that there's nothing to worry about, they will even look at all my accounts and update them to current rates which are lower than the ones I was paying. I agreed(to get a free phone and have my 4 contracts reviewed). I was told my monthly installment will go down by atleast R300. A few days later my delivery arrived. To my surprise it was an expensive phone and a wifi router, which was not mentioned during the conversation. I immediately phoned their customer service, and the person on the other side told me 3 of my contracts were upgraded, and my installment went up from R1100 to almost R1500. I requested they arrange a collection and revert my contract back immediately. So far, I have made more than 10 calls to vodacom, which I was sent from pillar to post, and still no one helps, and the first debit order has gone through.