Vodacom De*****ing me

I was called a few days ago to upgrade my phone. Spoke to 4 different consultants all confirming the same thing, that I would pay for my old phone until August this year and the new phones payments will kick in then only to find out that I am going to be paying for both cell phones at the end of the month! I then called in and spoke to Mpho who is a team manager or supervisor in the customer care department only for her to cut the call on me!?