A seller cannot delete his account if they have recent transactions, but eBay can remove the seller if they have broken any selling regulations, this looks to have happened here.
You need to contact Customer Services for them to open a case or refund you for your item.
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 do recommend contacting CS very first thing in the morning, when the lines first open, as there's more chance of Dublin answering.
@danny.92harvey