Angry customer

So I ordered a pizza and paid for it using the Debonairs app on the 13 of July in 2018 at 18:52pm. I waited for 30 minutes and decided to call them and they told me that it is busy and that I should wait which I waited. I then received a call from them after some time and the manager told me that they cant deliver where I am staying and that she will contact Pretoria cbd for my delivery and that she is going to get back to me in 15 minutes. I waited for another 30 minutes then I decided to call them back and asked to speak with the manager which she dropped the phone on me, so I waited for my pizza till today and I was never refunded. I decided to go to Debonairs Pizza in Pretoria cbd and asked for my money that I paid and the manager there contacted the Debonairs manager in Pretoria West and the lady asked to speak with me and she told me that, that manager that assisted me that time resigned and that I will be refunded on Monday the 13/08/2018 which I am still waiting for my refund till now. I will never ever buy anything at Debonairs Pizza ever again and they really do not know how to treat their customers and instead of getting an apology from the manager, she just told me of the owner that is overseas etc.