Bad service> ******* just want money from the students

very bad experience, I failed my module with 2 marks, just for me to notice that my assessment that I uploaded on the day of my exam had missing answers which they didnt mark. Back and forth emails was sent to them requesting that they check that and they can check the proctoria footage as they were monitioring the screens. They now requesting that I request a deferral at a cost of R265 why I should I be paying this whereas the fault was not on my side. There was a technical glitch on their side when I uploaded and my answers had disappeared. I feel that Milpark is not very helpful towards their students. I mean I passed 2 of my modules and couldnt understand why I failed this module. I feel that Milpark is failing me and I must now pay for something that is not my fault.