You may need to wait 24 hours for that label to appear, to void that unused label for your a refund.
Can you perhaps just take this item to a Post Office which deals with Evri parcels. Pay over the counter postage, then you'll need to manually mark the item as dispatched this way:
You need to finalise the transaction now only on the Seller Hub here:
https://www.ebay.co.uk/sh/ovw
Go to Orders >> Awaiting Postage, click on the item then top left on View Order Details.
Far right from More Action drop down menu click on ' Mark as Dispatched' if you have it, add any tracking number there too.
To receive a refund for the cancelled label see here:
Find your label with this link . https://www.ebay.co.uk/ship/lmng/labels-history/seller-hub and to the left of the sales record there is a drop down menu under 'Actions' click on that , then click on 'Void Label'.
The refund will take between 5 - 21 days to process.
@jamesjordan151