Unhappy customer

I'm very disappointed and frustrated at this incident that took place yesterday. As I scrolled throw takealot looking for a air fryer, to my surprise I saw one that shown 90% discount and it original price was R1100, sale price was R110, as a consumer i had right to purchase the item, I did and paid for it, they confirmed my order and payment sayin it I'll be delivered in 5-7 business days, I was so happy that I finally got one for cheap as air fryer is expensive, It was going to be a mother day gift. This morning to my surprise takealot canceled my order apparently "no stock" then why not indicate that before I purchased it? I'm very upset as I always buy from takealot and I love their items, how can this happen they obviously made a mistake with the price because after I ordered they changed the price to R995, I AM , I AM DISAPPOINTED IN THEIR SERVICE, as a consumer I have to pay the price I saw now they wanna refund me. I want my PRODUCT