Thanks Gareth - It was worth checking, because that's the kind of stupid thing I'm more than capable of. The number is correct though. It turns out that Microservers are covered by the HP Enterprise business instead of plain old HP but, rather than offer a seamless transition to the page you need, it basically blanks you until you happen across a page where it actually tells you to piss off to the other site. Still no wiser as to why the cashback claim was refused. I'll have to wait for a reply.