UNISA lectures and IT are useless

I want to right about the unfairness and unprofessionalism of Unisa's Financial Accounting 1 lectures and their IT team. We are supposed to complete assignments online and submit to unisa. Now this my case. Assignment 2 of FAC1502 was due on the 16 July 2021. In my case the assignment was never posted on myUnisa. I have been trying since the 15th July to access the assignment online but it is was never available. On monday 18th July 2021 I contacted the lectures via their email about the issue the response was that I was assigned to a group (which I know nothing about) and I missed the due date. How do I miss the due date if I was never given the opportunity to complete the assignment (because the assignment was never available on myUnisa (personal login page). Is Unisa trying to fail black students intentionally by excluding them from accessing assignments. All their telephones given on the website or tutorial letters are not functional. I want Unisa to refund my money for this module because I am not given a fair chance to complete assignments like everyone else.