Does a person need a College Diploma to teach English in South Korea?

Hello everyone! I just wanted to ask if it's necessary to obtain a College Diploma in order to get a teaching job in South Korea? I took up a 4-year course in college and graduated in 2007 but I wasn't able to get my diploma because I didn't take the pre-licensure exams. My university only gave me the following documents: Transcript of Records, Certificate of Units Earned and Certificate of Enrollment (all documents are authenticated). Are these documents enough to get a teaching job in South Korea? By the way, I am an F6 visa holder.

Thanks in advance!