Incorrect Pricing, Rudeness, and Spoiled Chicken at KFC

Dear KFC Customer Service, I am writing to formally lodge a complaint regarding my recent experience at one of your outlets. On Tuesday, I enquired about the KFC Tuesday special and approached the cashier, Tumi, for assistance. Unfortunately, the service I received was unacceptable. Firstly, when I asked about the special, Tumi refused to speak English, which made communication difficult. When I repeated my question, she yelled at me to buy it with chips. I then asked how much it costs, and she told me R100. However, upon paying, she charged me R110. When I questioned the discrepancy, she simply said it was R100, then kept quiet and rolled her eyes. I also asked if I could request specific pieces of chicken, but she did not respond. To make matters worse, upon consuming the chicken, I discovered that the meat was black, which is completely unacceptable and raises serious concerns about food quality and hygiene. I am extremely disappointed by both the poor customer service and the unacceptable food quality. I request that KFC investigate this matter urgently and provide an explanation as well as assurance that corrective measures will be taken. Thank you for your attention to this matter. I look forward to your prompt response. Sincerely, Mrs Nora de Waal