Purchases are available immediately. Just follow these steps: I've downloaded my 10 free images and they all have the Adobe watermark on them, so I can't use them. Why do they have a watermark on them?
My purchase has not showed up.
If you have licensed it, it should show up in your license history. Be sure you are logged in with the same Adobe ID that you used to license the image.
You have 1 license available so when you find the image you require, select 'License & save to Computer' or you can 'License and save to' a CC library.
Then it will appear in your license history as Brad said.