Poor service from Vodacom

On Monday, I saw a white Samsung galaxy A50 advertised on vodacom's website. I wanted to purchase it immediately as I urgently need a phone. As i proceeded to the check out part, it did not allow me to proceed. A note popped up saying that it did not pass ***** check. I then contacted support on the website and they told me call the sales department as they were not able to assist me. Sine Monday multiple people have been responding to my issue but no one is able to help. All of them are telling me that they are busy trying to sort it. I have been waiting for 5 days and cannot wait any longer for this problem to be solved. When going to the website now, I notice that the phone I wanted is no longer available for R3899. Please can someone assist me so that I can get the phone that was advertised at R3899.