False Ads posted on social media

Earlier on today i have been keeping a close eye on their "black friday" deals. I came accross an ad on Instagram advertising a Samsung Galaxy note 20 Lte for R669 on a 24 month contract. I clicked on the link to apply but to my suprise noticed the amount has gone up to R919? I contacted them to find out whats going on. Luckily i took a screenshot of this "deal". The sales person advised that this was for a 36 month contract and that he was going to get back to me. I have not heard anything as yet but now notices the add has been corrected?? According to my knowledge the consumer law states if a product or service has been advertised at a certain price they will have to sell it at that price- not just fix the error and ignore the request...