Missing food items and long response on customer complaint

I am so unimpressed with the customer service at KFC. I complained 2021 January of a missing item in my food and wrote an email. I was given a reference number and told they will investigate my matter with KFC Springs. Over a year later I still have never gotten a satisfactory explaination instead each time I ask of feedback I'm sent from pillar to post (Facebook page and email). Why do you ignore complaints and make us fools. Looking at your socials many are complaining and never get matters resolved. Is this how you behave? Is this how your business thrives by robbing us? Do you ever close a case off or you simply ignore customers complaints? I am not impressed at all. It's 2022 to the end of it and still no feedback.