Avoiding refunds to students

I enrolled for two courses which was both paid in advance in full. My circumstances changed and I couldn't complete my studies. I have requested Damelin for a request on the one subject but has been waiting almost a year for assistance and guidance. On several occasions I had to phone or send emails for updates but the relevant parties is never available. My request was finally submitted to HO who process refund but was once again delayed due to outstanding documents from Centurion. Three weeks lapsed since they received the application and nothing was done. I had to phone Centurion to ask for the outstanding documents that HO is waiting for since Damelin do not know how to make use of an email nor a telephone. Another week has lapsed and two to three calls a days has been made with no response. If you cannot do you job get up from the seat and let the people do it who can. When I ask to speak to someone in higher authority the line always gets cut. Doesn't that tell you something? Does Damelin not have money? I have passed my waiting period as per their terms so I think I am rightfully owed interest