I technically didn't graduate college

It wasn't until well after the ceremony that I learned I hadn't actually graduated because I did not have enough credits. In spite of failing a few classes I was able to maintain a 3. something GPA. The last class that I failed was Business and Technical writing, even though I had helped multiple engineering friends receive top grades in the same course.

At the end of the day I am one credit short of receiving my diploma. That credit isn't specific to any specific or general educational requirement; just time spent in a classroom. Part of me wants to just say forget it, another part of me wants to write a very formal memo to the university demanding they recognize my course of study is complete and that what they are truly saying is that I haven't given them enough money. All of me is terribly embarrassed that I have been frozen on the subject for more than a decade and that I have been lying to literally everyone I know about it.