Second time I was told no stock, your order can't be processed

Telkom please stop advertising options on your website for items that are out of stock. I know you won't reply to this, but people should know this is false advertising. https://secure.telkom.co.za/today/shop/personal/product/samsung-galaxy-s22-ultra-watch-4-freeme-3gb-36/?#!k=product-detail-97765

Why do you do this, if you know you have no stock of the watches yet the option remains on your website?