Debonairs not prepared to refund customer for double billing

On the 9th of June i purchased for an order, the driver double billed me and swiped my card for 2 amounts instead of one. Since then its been a roller coaster in trying to get a refund from the store or even feedback from head office. Now 2 weeks later and nothing is being done. No-one seems to want to assist with this. The customer must keep calling the store for feedback and when you do all they can keep telling me is that they waiting for the statements from headoffice to see the double billing, even after showing them proof of this. Extremely poor service from Charles Debonairs Midrand and Headoffice.