Hey @Dan58, is it possible that you're referring to a different account, and not the one you're currently looking at?
I'm asking that, because had your files been added to your Dropbox account, then there should be a sign of them in the account's Events page.
Even if the content was later on deleted, it should show as uploaded -and then of course removed- when checking that page. It's rather odd that you see nothing in regards to your content there.