Thanks for reaching out and we're sorry to hear about what happened.
Could you try removing the thermostat from the base and charge it using a USB charger? Also, try to press and hold the display and see if there will be a change.
Let us know how it goes by replying to this thread.
Thanks for visiting the Google Nest Community.
Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.
If you have additional questions, feel free to submit another post and provide as many details as possible so that others can lend a hand.
Hope this helps!