There isn't a phone number it's a Call Back option, their lines are still open for another hour, it will be the Philippines call centre.
Or, come back here, there are many experienced members here happy to help you.
If you wish to, 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.
@1977georgina