Alternatively, upload it online and put the link in the comments.
Post a better sample and ask a cleaner to delete the old one.
PS: There is no such thing as an "Unpost button".
Two samples I was following were deleted two days ago. I have no idea which ones. All I get is:
I'm starting to hate WZS.
This is another development on WZS that makes absolutely zero sense to me. I don't think samples with followers should ever be deleted. The follow-function makes no sense if samples you are following can disappear at any moment.