Give me back my money!!!

I am beyond furious. I made a purchase on the KFC app today, 26/03/2023 after 13:00 of R139.80. The payment went off my account, however I never received order confirmation. When I called your customer care line and spoke with Zandile, she informed me that I needed to provided proof of this transaction as she couldn't see anything on her end and that they never received payment. I provided the proof of payment and she told me that she has escalated it to their finance dept and for me to wait 7-14 working days. I then called my bank Capitec who advised that the funds are not with KFC but in order for it to be reversed, they require a letter from KFC explaining that they didn't receive the funds. I called KFC again and spoke with Zandile who informed me that she is unable to provide me with the letter, even though she is telling me over the phone that there is no payment!!!!!!!! Make it make sense????!!!! How can you tell me over the phone that there is no record of my payment, I send you proof that the payment has left my account but you are refusing to provide me with a letter showing there was no payment received and for me to wait 7-14 working days for my money!!!!!!! This is ridiculous and I will not be using KFC again.