Misleading website/false promises

I ordered a bracelet (for R489. 50) on Black Friday the 24th of November from the Pandora online shop and during the checkout process, the site added on a free bracelet with purchase. The purchase went through, and my card was debited. Later that day I received a missed call from Pandora and when I returned the call, the lady told me that she does not know why I was called and everything is fine. The following Wednesday I receive a voicemail from Pandora asking them to call about my order. I do so and I'm advised that there was a system problem and I do not qualify for the free bangle as I did not spend a minimum R1799 to qualify. Firstly, it was your website Pandora, that added this to my cart. Secondly, if it did add it, this is very misleading and I should not be affected for your unreliable system! Quite irritated, I asked to speak to a customer service manager who wasn't very helpful, I then asked for someone senior to her and I was advised that a director would contact me the next day- which to this day has not happened. She promised that I would be refunded my amount of R489. 50 the next day (that was Thursday) and of course, still nothing. Such pathetic disinterested service from such a large corporation.