Kliptown secondary school disrespectful teacher

I am utterly disappointed in communication from the Maths teacher Mrs Winlock from kliptown secondary school. First she issues my son with a one day suspension letter for incomplete homework which I disagreed on because I don't see why he should miss class on all other subjects, so I sent him to school with a note that I don't agree and that his right to education should not be violated due to 1subjects homework. She than tells my son "this is **** tell your mother to come to school". This level of disrespect and fowl language should not be tolerated and needs attention