Unsatisfactory Service

I bought a meal for R300 and paid via card at the Kiosk, the card declined, went to an ATM withdrawn cash paid for the meal. Two days money went to KFC's account. I called branch forwarded the bank statement and assistant finance the money is paid into my account, when I chech nothing, text him on WhatsApp to inform him I haven't received my refund, he changed his statement that it's under investigation