eBay

And Foxette, OP was accused of changing postage location to get around the seller's requirements. Probably wouldn't get positive feedback for that either.

For the people supporting the seller - did you miss the part where it took over 7 days to send the item? The OP checked the post mark. If the seller needs to be reminded to post by the buyer then they deserve their neutral.

Did you notify the buyer that they may need to fill in a stat dec? While Aust Post probably won't ask for one, this little detail often helps locate the missing parcel.

You really should try to report her for auction interference. She bid on your item on another ID after you blocked her. This is not allowed.

I know the email is a bit rude but it has been 20 working days and no parcel. Maybe a little understanding will go a long way in this case.