Oh no, sorry to hear about your Nest thermostat.
Are you getting a specific message or code on the display or Nest app when trying to call for heat? If yes, what is it? Also, have you tried checking if all the wires are still properly seated on the base?
Since it's been since this thread was last updated, we'll be locking it if we won't hear back from you again within a day. Should that happen, feel free to create a new one if you have more questions or have other concerns in the future.