Pay more for our fault, KFC BROAD STREET

On the 15/10/2022 I went into KFC broad street and wanted to order 2 allstar box meals, to my surprise I was told my meal of which is R59.90 each inclusive of the soft drink was available to purchase for an extra R10 because the soft drink machine was broken, after careful consideration as all meals included the soft drink, I finally decided to by the 2 meals for their price as the cashier said that was the only option, I tried to speak to the manager who couldn't care less nor had a proper explanation as to why I had to pay more since its not the customers fault,in a nut shell she told me that was how they are going to sell the food and charge more, no customer empathy, I was not treated fairly as a customer nor received any proper feedback, I turned around and went through the survey to express my disappointment and also sent an email to their customercare, they did call me during the of which I was at work so after my shift, I purchased airtime and called the customer as they wanted more information from the email I sent, I presented myself ad the case number when I called them back, mind you this was to show that I was not happy with the treatment and the way I was handled, the consultant advised that a manager was going to investigate and go through the footage and call me back within 72hrs, that was last week Monday and I'm yet to get any response, this clearly showed why I have received the such terrible service on the 15th as the complaints team and manager assigned the case have not even bothered to inform me of any information or acknowledgement about my query yet alone keep to their service level agreement of resolution, absolutely disgusted and never thing of KFC AGAIN