False adverti*****t

I ordered 2 pizzas from Pizza Hut Glen Acres from the uber eats app, under the promotional menu, buy one get one free. I then received the amount of R252.80 that was for the 2 pizzas, under my understanding that 4 pizzas would arrive as this is what the special is. Only 2 pizzas were delivered to my house, and when I called the branch they told me they don't know why I only got 2 pizzas, and that there is a problem been going on with uber eats and the pizza hut with the promotional menu. I want my pizza's that I was supposed to receive, or I want half my money back.