Ambiguous course - costs more to renew it than to initially start the course

Started the TEFL course in February (6 months completion time). Completed in time, yet I failed my last two assignments. So it has expired, but to renew the course, you can only renew for 4 months at a cost of R450, which actually costs more than the actual course to begin with. AND they would not extend it from the date I paid, no, no. They renewed it only from the end of August (I paid In October) because that was when my original course expired. Makes no sense, but ok. So I redo my assignments and guess what? Passed one, but failed the other. So now my course has expired again, so I must pay AGAIN R450 to renew it? Ridiculous. With the mock lesson, no actual guidelines are given of what is expected from you. Surely you would provide that information to your students so they know what to do? Absolutely ridiculous. I am done.