You cannot, there is no phone number for eBay. The lies of communication is a Live Chat and sometimes when the lines are not busy, there's a call back option to select.
To Contact Customer Services it's a Live Chat, or you can select to speak and request a Call Back. Click on this link:
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
On the left sidebar you can see Have us Call you or Chat with Our Automated Assistant.
On weekdays lines open between 8 a.m. and 10 .m.
On weekends they open between 9 a.m. and 6 p.m.
The lines are currently close, so why not come back to us, explain the issue you are having, there are many very experienced members here now, happy to help you.