Are you sure this came from eBay? Sounds suspiciously like a spoof email. Do not click on any links in it. If you have, change passwords on all accounts you own , especially your email account.
eBay messages will address you by your real name, and not your username ID name, but to be sure contact eBay Customer Services ask if they sent you this message.
This is the easiest and quickest way to contact eBay Customer Services, for a Call Back option.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
Lines open between 8 a.m. to 10 p.m. on weekdays.
9 a.m. to 6 p.m. on weekends.
I recommend contacting CS very first thing in the morning, when the lines first open, as there's more chance of Dublin answering.
@hiirenkirnu