Problem at unlocking the 'Knight' class for my hero

In order to unlock this class you have to complete the training quests in Sword’s Edge. Well in my case I have completed everything but still the class did not get unlocked. Now when I choose quests at Sword’s Edge it says there are no more available quests.

Any suggestions of what can I do to fix that?

Submit a support request, and they should be able to get you straightened out.