Hello, to anyone affected by this problem, as I am becoming aware of a couple more...
I have been back to the stamp supplier and they are trying to assure me they are just old stock and should still be valid, but I am having my doubts more and more.
Apologies to anyone affected and for being out of pocket. If anyone would like a refund of the penalty fee, PM me or email dean.pugh@me.com and I will happily refund.
Sorry all,
Dean