Credit balance incorrectly tranferred

I had a credit balance of R11 858 in my student account at the end of 2017. On the 3 January 2018 when i wanted to register my modules for 2018 my account reflected a R0. 00 balance. I then checked the history and it showed that a transfer was made to NSFAS. Confused i called the finance department listed on the contact us list on the Unisa website and and till today there is no answer on the line. I've sent more than 5 different emails to the addresses given on the website. I havent received any response from the University. This is so frustrating since i havent been able to register any modules this year and it doesnt look like ill be getting a response from the university any time soon. I visited our local satelite Unisa offices and all they said was that they do not deal with financial problems. What is weird is that ive never received a bursary or loan from NSFAS and the transfer does not make any sense.