Order paid for, cancelled by driver and not delivered. Delivered after 2 hours

I placed an order on the KFC app at 17:54 and it assigned me KFC Jean Village, Centurion. My order was confirmed and being prepared. To my surprise, I then received a text that the driver cancelled. I contacted the customer care line the first time and was told that they would call me back after finding out the problem and why the driver cancelled. I waited and waited but no call. I called them back the second time and was told to hold the line while they tried to find out why the driver cancelled. I waited and held on the line and suddenly the line dropped. I called again and explained to them that it dropped. I was offered a voucher to use to reorder after 2 hours of placing my initial order for my 5-year-old son and me. I then tried to use the voucher and again was met with a problem. The app told me that delivery couldn't take place and now I had to wait for 15 mins. I tried after 15 mins, which finally I was able to order and now my order is being delivered... I'm awaiting to see if it will be cancelled again. I have been at it with KFC for the past 2 hours. Not impressed at all. My son and I have been starving. KFC Jean Avenue Jean village, highly disappointed.