It's a bit strange that your DD has expired.
Certainly mine was set up when managed payments began and has not expired. Is it possible to simply reinstate it rather than setting up a new one?
If you can't reinstate it easily, I think I would consult Ebay Customer Services. Get a callback tomorrow morning when you are more likely to be talking to Dublin.
Link below:
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)