I don't tolerate this kind of thing. If you find yourself in a similar situation and want out - call emergency services, say chest pain, out of breath, and where you are. You may find the train has now "registered" itself at the next station. It will reveal driver to be using intentionally tricky language. "Cannot stop" It's not that the train can't stop, trains can obviously stop wherever and whenever they want. It'…
You're being downvoted because what you propose is an abuse of the emergency services system. And that's bad. I wonder who's conversely taking action on the badness of DB abusing every customer of most of their services.
The premise here is kidnapping - I don't think using emergency services in a kidnapping is out of the question.