Set up Problem updating Firmware and offline

Hey all, ive just had my RING Pro Doorbell (wired) profesionally installed using the transformer that came with the unit.Upon setup everything works as it should up to a point. I set up using iOS and the 'Scan Me' QR code and the unit proceeds to set up with the spinning white LED and then asks to connect to my WiFi which it does successfully, upon which the LED turn to Blue. After successfully completing this process, the app states that the unit needs to update the firmware and that this should take up to 15 minuets. On the app video it shows that the unit should have a slowly flashing white LED, but on the actual doorbell there is no LED activity at all. This lasts for aproximatrley 5 minuets after which app shows the unit to be offline and wont reconnect. The actual doorbell seems to go back into setup mode at this point with the audio introduction and the spinning white LED.I have tried repeating this process numerous times and I have done a hard reset and turned the power off but to no avail. The Heath report on the app states that everything is fine and that the firmware is up to date. I have also tried installing on another device.Additionally during the "firmware update" the unit actally appears to work as it detects motion ouside and connects to a live feed!Im thinking I may have a faulty unit??