James,
What Bloody next from these Guys!?!? I just received a Kit from them at our same Post Office this Monday, no problems. In the past they once charged me about 25% Customs/Duties Fees, (that's one order of over a dozen) and my wife unknowingly paid it, I wouldn't have paid.
I'd be demanding an explanation, they appear to "make it up as they go along" at times. To my knowledge the list of things that are not allowed entry couldn't possibly come remotely close to a plastic Model Airplane or accessory!
Hope you get this resolved, I'd be &^(*^*% furious!
Cheers,
Lance