I'm afraid that if the phone number associated with your Nest account is non-existent, there's nothing much we can do about it. The best route to take would be to reset your Google Nest device to it's default settings then set it up on another working email address.
We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.
