KFC charge double and not correcting their mistake!

I placed an order on the app and payed with my debit card only to find out my order was not on the board when I arrived at the Ceres store on 1 March 2022. I had to reorder and pay cash. The manager was made aware that I paid twice. I contacted the customer care and after sending them proof that I paid cash and it went off my bank I was informed that a payment was made into my account. It is a month later and I still did not receive any payment nor any feedback from KFC, and this after phone calls and emails. KFC Customer Care Case CAS-936010-H3F1D1. This is definitely not the correct way to treat a customer. Or in this case a former customer as KFC will never see me again.