The site doesn’t email you when completed- instead you’ll see ‘100% completed ‘ above the content  when logged in and the links in the ‘Rewards’ box change so you can download your certificate and badge. So do log in regularly to check your progress.

If you can’t work out which activities still need completing after the final week, expand each of the sections in turn and look for any circle without a tick on the right of an item. That activity still needs to be completed.