KFC MALVERN “OFFLINE” so I pay more

On the 11/02/2021 on the way home from work I decided to buy KFC from the nearest KFC to my home, in Malvern (Queensburgh). I attempted to order online using the mobile app. Since they had great online specials. However, the location for this specific KFC branch was greyed out. After numerous attempts of refreshing the app and even using another cellular device, it remained greyed out. I drove to Malvern KFC and enquired why it was not working. I was told to speak to the manager. I waited patiently. A female person leaned against the counter and directly stared at me. No greeting, no introduction. I assumed she was the manager. I greeted her and asked why I cannot order online. Her response was “it’s offline”... so at this point I asked if I could still get the online special, she quickly responded “no”. The online order would’ve been R329.90 but I had to pay the full amount of R400.00 and I lost out on a “free regular chips”. I ended up spending more time, more money. I chose KFC because it became reasonable to me at the discount price. I receive daily marketing emails encouraging me to use the KFC app especially for discounted online orders but now, I couldn’t get that deal. So the app is offline and I have to pay the full price? Even when I’m collecting the order personally, this wasn’t a delivery. That’s a separate issue since I only stay 5km from this KFC but the app says there’s no delivery to this area. I did call customer service, they too can’t say much. Except that the store can manually switch the app online and offline... which also seems suspect to me. It doesn’t make sense that I have to pay more because their system doesn’t work.