It does seem strange that the number was initially accepted and the items shown as collected. You could contact Ebay Customer Services (use the link below to get a callback) or you will have to wait for your payment.
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)