You cannot continue at SU that year, and you may not study there as an occasional student. SU's letter suggests passing relevant modules in your field, of the same standard and workload, at any university; the SRC handbook mentions Unisa. Bursaries or scholarships may be withdrawn, so check with your funder. You can ask the Centre for Student Counselling (supportus@sun.ac.za) for support. Source: SU readmission letter 2025 and SRC Readmission Handbook.