KFC doesn't respond to refund enquiries about unfulfilled orders.

I ordered a Festive Feast online (https://order.kfc.co.za/) for collection (QSkip) on 8 December 2023 at around 17:30. I paid using Zapper. After the 3D secure screen and accepting the payment on my phone, I was redirected to the KFC website, but it never loaded.

I checked Zapper and the payment went through. The next day it also reflected on my bank account. But I couldn't collect my order as no order number was displayed on screen.

I contacted KFC twice via their website but have not yet heard anything from them. I want a refund as the order was not fulfilled.