Bullies - just trying to make a sale

Vodacom - I am so disappointed in your service. My number was due for an upgrade last year...and like clockwork in April 2019 one of your consultants phoned me to offer me "a great saving"! After expressly telling this consultant that I want to go into a Vodashop to upgrade on my device, I was promised that this amazing online upgrade will not influence my device upgrade, only save me money, and I will still be able to go into any Vodashop and get a new device. Fast forward to December 2019 when I finally have the time to go into a Vodashop and get a new device - lo and behold the online upgrade is blocking my device upgrade until 2021. After numerous, and I mean NUMEROUS, frustrating phone calls to every department imaginable in Vodacom - I get the following feedback today: "We have listened to the recorded phonecall of April 2019. The consultant made a mistake to inform you that you could go into Vodashop and still upgrade your device after doing this online upgrade. After giving the Cancellations Dept all this information, they are not willing to cancel this upgrade, because you are due for an upgrade again in November 2020, and you can wait until then." This is unacceptable. Your consultant made a mistake and misled me to make a sale - and now I, the customer, am paying for it. I feel bul****, and that my consumer rights were violated. The funny thing is that I know of another close friend to who this exact same thing happened... and Vodacom was also not willing to reverse the upgrade.