You're looking at it with from different frame of reference. You have knowledge of how all these things work. OP hasn't a clue about it.
From his standpoint: He was sold a bike with a fault. The fault was fixed, but then it developed another fault. He sent the bike back and then a trader, who he doesn't know tells him it got lost, then it got lost again. Finally, he gets a bike, which isn't his original one. He asks for a bill of sale so that he can get insurance, but is refused. Due to circumstances beyond his control, he now has a bike he can't insure. Insurance is import to him. He doesn't understand why he can't have a bill of sale when he paid good money for his bike. Given the problems he's had, he's suspicious why he's been refused.
Now that we all know the story, we can see how things could have been done better. Lack of knowledge was the main problem. Hopefully, that's been solved after OP read all this.
If you saw that programme on the TV the other night, you can see how easily the mind can be persuaded by very small things to see a totally different picture to reality. We're looking at this situation from a rational uninfluenced perspective, so we get a different picture to OP.
Hi Dave, Just to confirm the facts...
I have not been involved with fixing any faults.
You mention that a brake was blinding, I assume you did the adjustment which is what took five minutes.
As far as I know there has not been a second fault.
He didn't send the bike back.
After you had tested the bike and had told me it was perfect, Alan called me, not his supplier, to see if I could help. As I knew some of the history, I offered to have the bike collected at my cost. Tuffnells, first of all could not find Alan's house. Then they then picked the bike up and lost it. On hearing about this, I immediately sent a brand new replacement bike to Alan. This too was lost by Tuffnells. On hearing about this I sent a second brand new replacement bike with an upgraded battery by way of compensation for Tuffnells inefficiency.
Alan should have taken it back to the shop from where he bought the bike. I was simply trying g to be helpful.
The bike collected by Tuffnells eventually arrived and as suspected there is nothing wrong with it.
Alan was not refused a bill of sale. I told him he needed to get that from his original supplier. I told Alan I would be happy send him a proof of ownership and confirm the value, but I needed the serial numbers. I received that information yesterday. Today he will have the document he needs.
What is unacceptable is the way Alan has publicly questioned my integrity.
No one could or would have given a better service.
Most importantly there was nothing wrong with the first bike apart from the brake adjustment!
Regards David