The Constitutional Court is in Braamfontein, Johannesburg and it is the highest court in South Africa. It deals only with constitutional issues. There are 11 Constitutional Court judges but cases only need to be heard by at least 8 of the judges.
No other court can change a judgment of the Constitutional Court. Even parliament cannot change the decisions of the Constitutional Court. If the Constitutional Court makes a decision that says a law must be amended or it cannot be passed because it is unconstitutional, parliament can decide to change the law in order to make it constitutional.