Upgrade going wrong

I did an online NO PHONE DEAL upgrade last month, it started from the 1st of this month. When I did the upgrade I was told I will pay R359 pm until Feb for this upgrade and after that it will be the normal amount of R169 for the no phone deal due to the fact that I still have to pay the handset installment of the previous contract until it end in Feb. It was fine with me. Now suddenly my Bill so far is R549 - I phone customer care and I was told it was because of the phone installment (what phone installment)? I took a no phone deal. Then she rep**** it was the previous contract phone - for the previous contract I paid a total of R262.32pm the handset was R166.67 now suddenly its R380? Where does this handset installment of R380 suddenly comes from? for a no phone deal I took for R169pm. I demand Vodacom to sort this **** out, I have 8 contracts, 3 ending next year, I will close them all one by one and move over to another network. This is ****************