NEW OSA SYSTEM A DISAPPOINTMENT

I would like to express my disappointment with the new OSA system, yesterday I was writing an exam and ar 13:45 I tried to submit my work I received a 504 error message after all sorts of attempts time was up. Mancosa live chat is not live, you get an automated message saying 'currently responding in 48 hours. Live chat that responds in 48 hours, is a shock. Student services don't answer phone calls. I went to the Joburg office and all i got was we are still investigating, no one even bothered to ask for my details. I have never missed a deadline and I will not be disadvantaged my system errors. I want answers. I logged many tickets only 2 responded with the following reference numbers 565594 and 565544.When I follow up the tickets they state 'case closed'. I am very unhappy. Many thanks 164499.