[m463]

> When I finally got hold of someone I was told that in order to prevent this, I should prewarm the car using the app prior to using the car.

They gave you a bullshit answer - the car would have had to start to pre-warm too.

The advice I would give is not to park with a low battery in cold weather, since it will lose range.

That said, the car should warn you:

  Battery Low

  There will be significantly less energy available
  from your battery if it gets colder.

  We recommend charging now.

Of course, regular cars have cold weather problems too. Never park a gas car in freezing weather with an almost empty tank (since there is some water in the tank, and it might freeze the fuel pump or lines).