I am in the customer’s shoes and have been wearing them daily for a very long time. I do not work for Wyze. I am a customer just like you and have had firmware updates fail because the cam lost connectivity. I do bulk updates on several dozen cams at once and occasionally, one doesn’t get the entire update. When this happens, I manually flash the firmware. It is the only way to get a complete copy onto it since it will no longer connect to get an OTA update.
It is also most likely the same suggestion that Customer Support will give you.
The update most likely isn’t the issue. More likely it was a loss of connectivity on your network during the update download process.
If the cam will not log into the network, will not enter a new setup routine, or will not factory reset, a firmware flash is the last resort.
Download the firmware, transfer to a blank 32GB card, unplug cam, insert card, press and hold setup button while plugging it back in and wait for the red\blue=purple lights