Follow up to engine damage earlier this year

As I mentioned back in April we had the engine in the cruiser rebuilt after the engine over heated when the belts came off the newly fitted alternator stopping the water pump. When the engine was rebuilt we found the pulleys on the alternator did not line up with the pulley on the water pump/main crank pulley. Fitted new alternator and no more belts coming off.
As mentioned in previous threads we contacted the company who fitted the alternator and were basically told bad luck. Eventually it was handed to there insurance company who asked for the alternator to be returned for testing which we did.
After 6 months from initial problem and little reply from them I decided it was time to get things moving so sent them a letter demanding payment or legal action will be taken.
The insurance company rings and says they have been waiting for my insurance company to contact them. I said I haven't put in a claim with them. Their reply was, we will get an assessor to look at the car then if they can't come up with something we will send it to a forensics investigator.... huh....
I asked what the assessor will being looking at as it is already repaired and you have the alternator. They said he will look at the car?????
Anyway the assessor turns up and I asked him, he was a bit puzzled as well but looks at the car to see how it all fits now and takes a few photos. He seemed to think they should have just paid for the damage as the new alternator has fixed the problem so would indicate the other alternator or the way it was fitted was the cause of the problem.
So here is hoping they will actually do something soon and we may get our money back for the rebuild. Mind you I'm not spending the money yet.
Will let you know of the outcome when the insurance company actually gets off their bum and does something.

Josh