You cannot, all eBay staff are working from home, because of Covid.
There is sometimes a call back in place, but the usual line of communication is a Live Chat.
Use this link to contact eBay Customer Services.
https://ocsnext.ebay.co.uk/ocs/cusr?query=1455
Scroll to the very bottom of the page and you will see the options, Have Us Call you and Chat With Us, and an approximate waiting time, it's usually a few minutes.
Lines open between 8 a.m. and 10 p.m. today.
