Two things firstly getting refund on old label (assuming you purchased via ebay)
How to cancel a postage label
Labels purchased on the eBay labels platform need to be used within 14 calendar days. If unused, make sure to void the label within 14 calendar days to get a refund.
Here's how to void a postage label in My eBay or Seller Hub:
- Select Selling in My eBay, or select Orders on the Seller Hub Overview page.
- Select Postage Labels on the left-hand side.
- Select Actions next to the label you'd like to void, and select Void Label.
Secondly goto the item in question (easier on desk top) goto the tracking part and update with the new number you had from PO and that should kick in overnight and update accordingly, which in turn should release your funds sooner.