We're sorry to hear that you're having that kind of concern with your new Nest Hub ― let's check it out. May I know what phone you're using in setting up your Nest Hub? Is it connected directly to your Wi-Fi and not on data? Have you had the chance to finish the set up or not? If not, where did it stop? It would help a lot if you could do a sequential reboot first. Unplug the power cord of your router followed by your Nest display. Plug them back in after 3 minutes or 5 minutes tops. Restarting your phone might also help.
You can also follow this guide in setting up your Nest Hub for more info and troubleshooting.
Keep us posted.