Really sorry to hear this Danny.
I don't understand how you can make a claim are you covered by insurance or are you making a claim through seat by using genuine parts.
You'll be back on the road in no time mate, chin up.
I think 'General Traffic' is the motor factor
You will need to prove liability, or for them to accept it. Which will cost you for an expert opinion to investigate and write a report.
And even then, they'll just claim it was fitted by an untrained person & walk away. Their insurance just won't stand for it I'm sure.