I must confess that I haven't studies it to this details but have you read all the way through the licence agreement that came with your previous copy. Does it say that the licence is not transferable across continents?

This all seems very straneg to me. You bought a legit copy in the US, later moved to the UK and because of this find yourseld not eligible for the 'standard' upgrade routes.

Unless this is specifically disallowed in your previous agreement then you must be able to upgrade in the normal way. Have you actually spoken to anyone at Adobe UK or just recieved automated messages from web sites. If you speak to them then ask them specifically which part of your licence diallows update.

Other than that then you are left with oen real option and that is to find a trusted mate or family member in the US to act as a 'broker'.

If that fails then then I'm at a loss.

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I'm not young enough to know everything!