Obtaining a visa for working at an International School with a qualification equivalent to Be degree

I have an ADE qualification from North West University. I have verified documents from SAQA, and the university, of the qualification's NQF level 7 - same as a 4 year PGCE or Bed
However, it does not state 'BA'. The school I applied to mentioned it might be a problem to obtain a working visa. Even with 20 years experience in teaching. What can I do?