Some people have been charged a lot of money using some 0800 number , far better to use the easy route,  from link below and  it gives a Call Back option.

Contact Customer Service very first thing 8 a.m. weekdays,  9 a.m. weekends and there's more chance of Dublin answering.

https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid

@trigger8491