Summons without warning

I was summonsed on 27 December 2017 for outstanding student account. I already started an application on 4 December to settle my student loan however FNB never processed it. I tried to contact the Univesity of Stellenbosch account department however they are closed. Since 27 December when I was summonsed and apparently only have 10 days to resolve the issue... the University accounts department has been closed. So how can I fairly sort out my issues and set things straight if thet are not even open. I never received a letter or any forewarning either. I think the way that the ubiversity is treating their students is unacceptable. I was in touch with the program coordinator to ask how registration in January 2018 will work and she said I must first settle my account which I was trying to do. How can anyone sort out anything over the holidays when everything is closed. And get summonsed at your front door on the 27th of December.