I sold a pair of shoes and sent with Aus Post not Sendle. The shoes were delivered but the tracking still shows I haven't sent via Sendle. How do I advise Ebay that I the shoes were sent by Aus Post and not Sendle?
It would seem you have purchased a Sendle label through eBay AND paid AP for the actual postage.
You are extremely likely to have ended up paying 2 lots of postage, and are unlikely to get a refund for the unused one, as you only have five days to cancel.
