It's too expensive to be replaced

I ordered two small pizzas, both thick base for delivery. They arrived I payed, I opened the pizza, pizza was raw. I called them and told them their pizza was not cooked. I was told that that's what a thick base is like. It was raw! The lady said she cut the pizza herself which is besides the point. I asked for a replacement pizza, I was told it's too expensive to be replaced. I am complaining because I paid R140 for two small raw pizzas! Obviously they are expensive that's why I am complaining.