Don't remember the theme, but if the author is still on Mojo you might want to send them an email (via their profile page) and ask if they'll help you out with the bugs? If not, you could hire a freelancer to help you take care of the errors. Sometimes all it takes is a few lines of codes and it shouldn't cost you much. Of course, this will depend on how severe the bugs are.
That's all the advice I can offer you about that. Hope it helps.