Upgrade complaint

I called 082 178 44 to assist with my upgrade. My first call was at 18:39 where the agent was unhelpful and falling asleep on the call (yawning) and told me not to raise my voice where I ended up cutting the call. I then called again at 19:05 and told the agent I want to upgrade to the Samsung Galaxy A50 for R299 as it shows on the online website (I didn't continue online as I was told it's a error which is not Vodacoms fault). I was told its R399 and could be an error on the website. I was then told that Vodacom reserved the right to make errors on the website and can't be held liable which is absolute nonsense. Why have a website with prices if it can't be trusted.I attached the pics of the price I saw on my side. I emailed vodacom customer care with a full detailed complaint and they rep**** that I must call sales to resolve it. They referred me back to who I'm complaining about. Absolute horrible service and lack of ownership.