Lotus FM radio presenter Govender caused a stir after posting comments on the social media platform following Zuma's address at the African National Congress' National Policy Conference here.
"Just heard a Zombie Zuma giving a speech on the news. Massacring the beautiful English language... Uneducated creature. Even the other moron (Zimbabwe President Robert) Mugabe speaks much better," Govender, who is also a columnist and community worker, wrote.
The controversial remarks led to online reactions with some people supporting his freedom of speech while some condemning him.
However, one of Zuma's sons Edward Zuma, speaking on behalf of the entire Zuma family, refused to accept the apology and threatened to lay charges against Govender.
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The South African Broadcasting Corporation, which owns Lotus FM, yesterday distanced itself from the comments and cancelled Govender's yesterday, claiming his comments had brought the organisation into disrepute.
There have already been many calls for listeners of and advertisers on Lotus FM to boycott the station, although Govender only did a weekly show on the station.
Even though the comments were made on Govender's personal Facebook page, analysts pointed out that there have been many legal cases where people were fired from their jobs because of their behaviour in public or on social media which could cause harm to their employer or dent their image.
"He could have expressed his view in a less derogatory way and I don't think his retrospective apology will hold any water if it goes to court," said a lawyer who works closely with cases at the South African Human Rights Commission, on condition of anonymity.