If your account is not used for 60 days it can automatically deactivate and you may need to provide verification to eBay again that you are the genuine owner,  as sudden selling activity on a dormant account can suggest it's been hijacked.

Contact CS with the link below for a Call Back option.  Try at 8 a.m. on weekdays as there's more chance of Dublin answering. It's a Call Back option, so you'll hear if it's Ireland calling!

https://www.ebay.co.uk/help/eua?id=5190

@mazdafiesta