Unisa Finance Department Inept?

I have been trying to get hold of someone via telephone and email since 15 February this year to resolve financial issues from 2010 that I was not even aware of until deciding to start studying again next year. It is impossible to talk to someone telephonically, the numbers just ring or are answered by the wrong department. I've been emailing the finance department almost every week since July and get the automated response that my email has been received by Unisa, but my account is still blocked. I received a response that I need to pay the outstanding amount, but this is prescribed debt and it is ******* to request payment for it especially considering that I had no knowledge of the debt until this year. Totally unacceptable, I am not even sure what to do next. I need to study next year.