There's no link for contacting ebay in help and contact. All the links are related to problems with items bought and sold or contacting Paypal. I couldn't find any way to directly contact ebay which is why I posted here.
Someone seemed to have got hold an email address that I only use for ebay and I thought that should be flagged up with them so if anyone has contact details I'd be grateful.
I never click links I don't know. This particular email didn't have any but seemed to imply that there was a virus embedded in the message that would be activated just by reading it. As far as I know this is not possible. I keep my antivirus up to date and run the normal Windows firwall. It hasn't raised any alerts and nothing's happened in the 48 hours specified in the email so it looks like it was, as I suspected, a try-on.
However as I said earlier I think ebay should be made aware that someone managed to get my email address through them.