Just a word of warning... you've also said:
If so it could be viewed by a small claims court that you are in fact running a business. It doesn't have to be profitable or even that busy to be counted as a business.... it might just be that you've not registered it. So if your customer might have made the assumption he was buying from a business he could expect the service and cover that he'd get normally.
Perhaps you can share the facebook page or an example of the way you sell your bikes?
andUpdate.
Today whilst out delivering a fixed ebike in Lockerbie,
this makes is sound like you might be selling multiple eBikes, and have a facebook page / group for the selling of eBikes.comments on any Facebook page or group.
If so it could be viewed by a small claims court that you are in fact running a business. It doesn't have to be profitable or even that busy to be counted as a business.... it might just be that you've not registered it. So if your customer might have made the assumption he was buying from a business he could expect the service and cover that he'd get normally.
Perhaps you can share the facebook page or an example of the way you sell your bikes?