Makro - speaker on special order cancelled due to no stock, but still available at original price.

On Saturday 30th November 2024, I bought a Samsung speaker online that was on special for R3999. Transaction went through successfully, and today to my surprise I get notifications that my order was cancelled due to no stock and my refund will be processed. When I check the website, the speaker is available for purchase at R6999. This is unfair and false adverti*****t, what was the special for? Link to speaker: https://www.makro.co.za/electronics-computers/audio-video/dj-speciality-audio/dj-equipment/dj-equipment/samsung-mx-st50b-sound-tower/p/***_EA