Sounds typical of a few couriers (UPS?), some couriers pay the duty up front then demmand payment prior to delivering, insist on using USPS.
I would love to use UK dealers, but where can I find a 9ft 4wt Redington in the UK??, a 3wt GLX loomis??, I've contacted importers and major retailers and always seem to get the same line, we don't sell enough so "TOUGH", to be honest I'm getting sick of it, I use 2,3,4 & 5wts and always struggle to find what I'm after in anything less than a 5wt.
So I'm going to import until the UK importers get a grip and service the fly fishing community, not just the big markets hand picked based on turnover, there is more to fly fishing than 7wts.
It's the same with lines, I need to have spare 2 and 3 wt lines because most UK dealers don't hold stock, I've purchased dozens of Rods and Reels from the UK high street over the last 40+ years but that's going to change, loyalty should be a 2 way thing

.
There are very few stream or beck fishers I know who can source the gear they need, it's always a constant struggle.
Regs, G