Slightly unrelated, but talking about BIG companies, I had Royal Sun Alliance threatening me 5 years ago...car nicked whilst in my charge etc etc., longish story.
The dealer was paid out for the loss, so the insurance decided to take me on to get it back.
I admitted 25% liability and sent them a c/q. This was retuirned saying they wanted payment in full. I told them to get stuffed, and see you in court.
Strange. I've never heard from them since.
They've got 1 more year to take me on apparently, but the solicitor reckons they decided it wasn't woth the hassle and bad publicity if they lost.