as far as i’m aware, if it’s a course you need for your degree, there’s like… not that much you can do?
if this was for a summer course and you haven’t heard back yet, i’d suggest you go to your registrar and see what they know about your exam results. we’re now well into the fall sem, so those grades should be out and available. hopefully that’ll give you a better sense of your circumstances.
you can also ask them if they’re aware of any exceptions that’ll allow you to graduate without the course. unfortunately i don’t know too much about graduating without your requirements, so i wanna make the safe assumption that it’s likely not possible. your registrar might know something i don’t, but at the same time don’t get your hopes up.
good luck with this– i hope things work out for ya.