If it's an issue specifically affecting eBay UK try logging onto eBay via one of their other websites, such as https://www.ebay.com, which is the American version of the site, and see if you can progress the case from there. If it'll work that way then you won't have to wait for eBay to get off of their backsides and sort the problem out, which knowing eBay more than likely won't be anytime soon.