Bait marketing and still no refund

Placed an order for a specific item and added in a few other items to make the shipping worth it. Got a notification 5 days later that the order was packed, then another to say it shipped the next day.

2 days after that, I got another notification saying the specific item I wanted was out of stock. As the order was already sent, I couldn't cancel it. I didn't want to pay delivery costs for the other few things, as I would not have ordered had the item shown as out of stock. Asked for refund of the item as well as the delivery fees. Was told I can't get delivery fee back as the other items were delivered. Again, I would have cancelled had they asked before sending the item. I insisted on the fee, but still do not have any refund reflecting as of today, about 2 weeks after.

During all this, the specific item I wanted was CONTINUALLY shown as available. Despite them telling me it was out of stock. Snatcher, this is called bait marketing and it is ******* in South Africa.