Coffee machine error

On Sunday Hi-if corporation advertised a Russel Hobbs coffee maker for R249. Yesterday I saw it was then marked as R279 I decided to purchase it online as it is the only way to purchase it. This morning I decided to get one for my mom and saw it’s R399 and Thought it’s weird, in a matter of minutes it’s gone, totally disappeared. Now they emailed me stating it was a technical error but at the store they stated it was out of stock. I am utterly disappointed in this bad service there is a lot of customers that saw the deal and bought it but upon collection they give you a kettle which was not what was advertised and what we as customers bought. I feel this is unfair towards us as loyal customers for years. I want what I bought and what I paid for!