I agree with the comment of life to short.
It is better to sort out a replacement and move on and enjoy some ride time.
If you feel strongly about the service provided buy you bike supplier you need to re-establish communications with them and if nothing comes of it get in touch with the UK supplier direct.
If they have refunded your cost for a local bike shops diagnosis it appears that some form of liability has been accepted.
Bike shops in general will remove and send the offending part back to the relevant agent.
As bikes are made up of many different manufactured parts a warranted part would normally go to the UK agent’s for example a Shimano unit to Madison or a Specialized branded components to Specialized UK.
It is rare now days for bike shops to directly cover larger warranty items.
A loan fork a possibility to keep you riding but that’s pretty much unheard off now.
I guess your experience of this fork is enough for you to source a different unit so it’s likely if a new warranty one was forthcoming it would probably be moved on and sold.
Just replace it yourself and get riding then send the fork direct to the relevant UK supplier along with your diagnostic report and account of your experience.

As long as you keep mentally and physically active and can adjust to a more simple life style is absolutely fabulous.
I’m lucky enough to enjoy good health and a wide range of interest all of which are outdoor related.
It’s is always easy to find one more reason not to do something than to do it and most people just keep to what they know or are comfortable with.
Stay flexible and take on the odd part time job if it takes your fancy trying something different to your normal work and don’t try to turn a hobby into an income it kills it dead.
We only pass this way but once.
Enjoy

I agree a bizarre decision but faced with access issues for both customers and deliveries as well as the shop visited by a good number passers by finding something to do if raining I guess it was on the cards.
The shop had just been full revamped which would have cost a bit but even so the need to move away must have been strong.
As for Ings being out of the way it’s still gives good access to the Kentmere fells and some interesting road options.
Wheelbase have managed to keep it going and they are just down the road and the Ings store has been open for a good four years so we’ll see.
As for Grizedale I hope the trail center has or is going to be upgraded as last time I visited it was pretty tired with only the bridleways worth the effort.

Every one is entitled to their opinion but the Ambleside shop will be greatly missed as it has been a destination for many years.
I believe that Biketreks has moved on to allow focus on the Ings store and the Grizedale shop and hire facility.
In respect of clothing you need to see Keith at the Ings store for a first class service and product advise.
As stated Ambleside has become more of a visitor attraction for the masses with all the associated parking issue.
At least at Ings parking is free and cafe facilities are available for that post ride binge.

And would you believe we even get
slim fit visitors as well with no regard for the great outdoors size is no reference for the selfish.

It could be a lot worse you should see the state of some of the popular places up her in the Cairngorms I’ll take stickers over human waist any day.

Might be a bit late with this advise but Canyon set brake to suit the country bike is sold into.
IE you can not get a euro brake set up shipped to the UK or vice versa.
So you should receive the bike UK brake set up.
Hope this helps and enjoy the bike.