No Communication by Unisa

I'm a student from 2000 till date, I have been struggling to be registered since 11/01/2021. Considering the covid 19 pandemic which we understand. I have made payment to FNB ACCOUNT as displayed in the Unisa website time is running it's been almost a month awaiting to he registered. Made booking online to enter the varsity turned away that my finances are not being credited to my student account. Send several emails for assistance no response. What frustrating me it's my last year not minding the exams in October/November but paid minimum amount R3790 but no response only threatening SMSes that are sent that "until minimum amount paid". No calls are answered no emails answered by the institution. Ohh. Lord help me what and where to go