Found it... thanks!

Thanks everyone. Michelle I tried that link but couldn't find a live chat option. I did actually send an email about this a few weeks ago, the customer support reference is 4732619. I got a reply saying appropriate action would be taken, but as far as I'm aware nothing's happened -- and the seller is now emailing me asking me to take down negative feedback. It doesn't really bother me but I do worry that he's done this before and he'll do it again to someone else.