Sorry to hear about your run-in mate, I had an incident with one of their busses today too. though it wasn't life threatening as yours sounds to be.
Coming through Claydon village, a first bus decides it wants to overtake me just before a bus stop... he then decides he needs to pull in to the bus stop so brakes hard and swerves in front of me...
Get your letter writing skills going, hopefully you will get a decent response from them. and hopefully you won't have any more 'contact' (pun very much intended) with that bus in future.
Good luck!