Sorry, eBay have neither an email or a phone number for Customer Services, presumably because an army of ' humans' would be needed here.
The main line of communication is a Live Chat orr a Call Back option, I recommend contacting CS very first thing in the morning when the lines first open at 8 a.m. then there's more chance of Dublin answering, select the Call Back option then you'll hear if it's Dublin's dulcet tones.
To contact Customer Services the quickest way is through this link below.
You can select a Live Chat or a Call Back option is available when the lines are not busy.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
Lines open between 8 a.m. to10 p.m. on weekdays.
9 a.m. to 6 p.m. on weekends