You are not talking to eBay here, we are members like yourself.
If you entered tracking numbers which showed delivery into the case details, this should have closed the case in your favour. You had 3 days after the case was opened to enter that number. Did this happen?
You should contact eBay Customer Services they have full access to your account, which we do not have, and they can see if any error was made here when the case was opened.
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.
@11azesm11