UNISA NOT RESPONDING

As a masters degree student living abroad I have to register before the 29th. The only way for me to register is online, but the registration page give an error, specialization phased out although my course is valid til 2024. I have send several emails without any response, i have phoned from an overseas number holding for an hour without any answer. I only have three years to complete my Masters therefore I cannot afford not to register for a year.