You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
After messaging our SA asking where the car is, got a reply the next day with a time to book in for collection on the 26th. No idea if this helped or just a coincidence but happy that I now finally have a delivery and collection date.