Bad customer service and selling items that they don't have.

I have ordered an UPS device from the Telkom website on 11/07/22. I was then contacted on 14/07/22 via SMS to inform me that they were out of stock. It however did not show on their website when I ordered the product that it was out of stock as I would rather have bought it from somewhere else instead. Despite having made several enquiries which have been completely ignored, I am still waiting for my order, more than a month later. I find it completely unacceptable that Telkom can sell items without having actual stock. This is not only bad practice but also completely nonsensical and not in line with the Consumer Protection Act. Very poor customer service as there were no updates, no explanation and no apology.