Alexandra, it seems that you created two zunal accounts. The first account: http://zunal.com/profile.php?u=329155
and the second account is http://zunal.com/profile.php?u=291936
When you upgraded your account, you were logged into to your first account. Therefore, your first account is upgraded and your second account is still active but not upgraded. You need to login to your other account if you would like to access to your webquest. Hope we are explaining this well.