Hi Greg,
Sorry to hear about the aggro you've had with the car.
I'm not going to comment either way about what has happened as I reckon it'll have to be sorted out through legal channels, possibly with the intervention of Barclaycard - so in the meantime I'd be careful to ensure that whatever you post is absolutely the truth - if things turn really nasty, RT could counter-sue you for Libel if anything you've said is not 100% accurate or complete.
And of course, while disturbing, this only describes things from your perspective. No offence intended
Personally I would not have posted this but would have sought legal advice and taken the matter from there - this post can only complicate matters as previously stated.
I hope everything works out amicably for you and RT without the need for legal redress, and that your father's op is successful.