Stuck in update (new gen 2)

I have set up a brand new gen 2 ring doorbell today and it set up perfectly. Then it started to flash white and appeared to go into update mode. I check online to see how long it takes and it says around 5 mins but could be up to 15. Mine was updating for well over an hour. I have tried a couple of resets, removing device then adding it again - however each time it is reconnected it goes into update mode again. Any ideas?