Refund refused but no pizza recieved

I'm very disappointed with the level of service I'm currently receiving at Debonairs pizza Vincent Park. On the 27th of July I ordered a pizza via the App, during checkout I got an error message and was told my order was not processed. The following day I recieved a message to say my order was processed and payment had gone through. I called the restaurant and was told since I paid online they would not be able to reverse the payment and that I should request a refund. I was transferred to the manager to request a refund and he told me that they would much rather send me a pizza, at this point I did not want pizza and just wanted my money back because I could not be faulted for their system errors. I then contacted the bank requesting a reversal. Earlier this month I received feedback from the bank telling me that debonairs had rejected my reversal. I contacted the manager once again who told me he would investigate. It has been 3 weeks and still no response from the manager or any feedback. I understand system errors and all but you should be more accommodating to your customers. If I don't get a pizza I should not be forced to pay for one just because of my method of payment.