No Response on all communication channels and bad service

two issues that i am struggling to get resolved as Mancosa is neither answering phones nor responding to e-mails. Issue 1: I was scheduled to re-write my Financial Management exam on the 30th of June. Realising the conflict between this and a Management Committee Business Planning session for my area that I could not pull out of I therefore student services to kindly reschedule the exam to a day earlier to allow me time to fulfil my work obligations as this was the 1st session for me since I joined the company and also because these studies are self funded. I am very disappointed that the request was not granted and no special consideration was paid to the reasons for the request instead I was told that I must make a plan or prepare to re register the module. Escalations to Sharita only went unanswered. I am stuck and i don't know what to do as i could not sacrife my job over studies. Also, i was not asking for extension so i dont understand why Mancosa could not meet me halfway on this. 2ndly, i had an assignment that was due for re-submission 3 weeks ago. their online system does not allow for the upload and no one is responding to either my e-mails or phone calls. I have had enough of this and considering to register somewhere else. They are not professional and treat you like they are doing you a favour - that is when they finally talk to you.