Sometimes a different method of verifcation may help. Contact eBay Customer Services see if they will send 2 micro deposits into the bank account you nominated for eBay's Managed Payments.
Once there, it's not instant, you confirm these back to eBay, they take back the micro deposits and you're all set to list items for sale, and to receive payouts from those sales. Or, CS may advise of a quicker alternative if you explain you wish to list this weekend.
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.