Overcharged / wrong items

On 10 July 2022 I ordered a meal via the kfc whatsapp line for the amount advertised. When I went to the restaurant to collect my order I was than charged a different price as advertised. I have send numerous emails to kfc customer care where they promised to sort out the issue. I got a call from an agent once and she promised that she will get back to me. Up until today no one has bother to reply and communicate with me as to what the outcome or findings was. I have send pictures of the products as well as proof of payment. Also some wrong items were added to the order. I am not impressed with the service that I received from kfc.