Sounds horrid. Yes, an idiot but their frustration is understandable with the end so close. I got stuck 50 yards outside Victoria once for 2 hours and it was agonisingly close and we did wonder why we couldn't just walk it!

So far as 'toilet' facilities, my sister got stuck in the snow on the motorway for 20 hours the other week and had to find a container in the car to use - until a kind person who lived near the road stopped by with soup and offer to use their loo.

Oyster-wise, call the Helpdesk, explain the circumstances and they should be able to refund the money back to your card.