Digital BW, The Print

I live in the U.K. and would like to use pigments in my Epson 870.
So I ordered Generations 4 from Mediastreet on Dec 18th.
In January I emailed them giving my order no. and got a "being 
processed" reply. However yesterday I received a bank statement which 
showed that they had returned my cash (minus a deduction) in 
December.  This must mean that they do not export to the U.K. So 
please can anyone tell me how I can buy pigment inks for my printer?
At present I'm using BO printing with Lyson's Small Gamut inks in
my Epson 800. As the cartridge is the same number as that for their 
Quad Black inkset, which they rate at 100 years' life, I hope my 
prints will survive me.
Serena.