My next problem is the Karma, I received it yesterday but it had a US power lead & warranty, the MFs won't take it back cos the packagings open (should have used my X-Ray vision)

Maybe it's just me and my paranoid mind, but it sounds like they've gotten some from sources other then Rio UK, ie they've imported some from the US or directly from China.
Very grey/gray market.

Apart from that you should be able to argue that the good sold to you are not of merchantable quality.