Refund or voucher

I have 2 emails already and I'm being ignored

I ordered a pizza on your App and payed for it at your Selcourt, Springs branch on the 24th of January 2021 and your machine showed an error when I tried to pay again it declined as I had insufficient funds because the first swipe went through from my account, The cashier did not issue me with the error slip as I thought it's a network problem but I went back after seeing that I've been debited and the cashier said it will bounce back to my account in 24 hrs and that has not been the case

Kindly refund my account or issue a voucher equivalent to the money you debited

Thank you