Zero percent in Exam and no explanation

I had such a bad experience with University of South Africa. I wrote PPH4801 exam in January 2021 online. The same way I have been doing 5 years in the varsity.Results came back, I had zero%. I have been phoning and emailing. Noone has come back to.me Even UNISA Ombudsman. I sent them an email 4th of June. No response until now. I have been emailing the professors since March. They do not even have a decency to respond or pick up a phone to phone.me. I have spoken to both secretaries they promised to forward my email to the lecturer. But nothing. They say UNISA helps the poor but imagine paying R7000 for a course and you have 67 % for year mark, you make the effort to submit your exam. But then no feedback. They are really playing with people's lives. I sacrificed a lot to do that course but now I am getting the run around. I am based in Cape Town. And it is COVID. Even if I can sacricifand go to Pretoria, the secretary said they are working from home. I am so disappointed ? with the lack of compassion.