KFC app does not work

For weeks I have seen the 9pc bucket available for delivery on the 50/50 price of R62 and everytime I try and add the items to my cart for ourchase I am rejected with a notification saying the option is not available but clearly in the images attached you can see the option is there no matter how many times I enter the app nd no matter he day he option is there for purchase on a Monday. It is extremely upsetting as a loyal customer of kfc to go on the app and be rejected food like this especially when I have gotten excited and old my kids and family about the special. In all honestly it makes me not want to ourchase kfc at all for that day because ive been let down so many times. It is infuriating the bad service received on the app!!!. KFC you have lost your touch.