If when using a laptop / PC with Chrome you cannot manually change that tracking number , you should be able to, then contact eBay Customer Services . Inform CS your order has been delivered and the tracking number needs to be changed on the order details , which does show delivery on the courier's / postal services' site.
They should be able to do a manual release of funds and the new policy of 2 days after delivery confirmation will apply.
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 between 8 a.m. to 10 p.m. on weekdays.
9 a.m. to 6 p.m. on weekends.
I recommend contacting CS very first thing in the morning, when the lines first open, as there's more chance of Dublin answering.
@baiste_6231