Gabriella Engels's lawyers have started a legal application, asking the courts to serve a person legal papers in a foreign country.
Lobby group AfriForum wants the court to set aside the decision to grant immunity to Zimbabwe's First Lady Grace Mugabe.
AfriForum lawyer Willie Spies says once the decision has been reviewed, it will open the door for criminal and civil action.
She [Grace Mugabe] has been granted diplomatic immunity and as it stands, she will unfortunately be able to visit the country and we won't be able to do anything, unless that immunity is set aside.— Willie Spies, AfriForum lawyer
Immunity is not a privilege that should been granted and invoked arbitrarily, but it is done according to rules. Those rules need to be applied in a just manner.— Willie Spies, AfriForum lawyer
We have to act with what we have at the moment and that is recognition of immunity, which was granted...in err. We believe it needs to be set aside.— Willie Spies, AfriForum lawyer
The Pretoria High Court will hear AfriForum's case on 19 September, Spies says.
To hear the full interview, listen below: