Extremely dissatissfied customer

I recently upgraded my headset at Vodacom Horizon after getting countless calls from Vodacom consultants reminding me that I can upgrade and offering me several packages to take. I eventually decided on the Iphone 6 on top up u choose Flexi 200. I am very disappointed that with the Consumer protection and TFC( treating customer fairly) acts in place you still have organisations who don't train the staff properly. I was not informed that I would have to still pay for my previous headset because I upgraded before my 24 months period ends now I am paying for two headsets ( WHY ?) .Had I been informed I wouldn't have upgraded, now I'm surprised by a bill of R 736.40 that I had not budged for and I am out of pocket