Have you fully registered for eBay's Managed Payments? Has eBay sent you 2 micro deposits to that bank account for you to confirm back to eBay?
If not, contact Customer Services to send 2 more. They do not appear instantly, and are small, easily missed only a few pence each, you need to check your bank account regularly, they do suddenly appear. Mine took 5 days to appear.
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 8 a.m. - 10 p.m. on weekdays
9 a.m. - 6 p.m. on weekends.
Automated agents will be available on chat outside of the above hours.
I recommend contacting CS first thing in the morning as there's more chance of Dublin answering.
@thomas140875