Hi mich ,
basically you are entitled to have the mauritian passport as it is said in the mauritian constitution
BY DESCENT
A person born outside Mauritius is a citizen of Mauritius if either of his parents is a citizen of Mauritius by birth (Sections 20(3) and 23 of the Constitution)
Now , what you have to do is contact the nearest mauritian embassy.
Should you get your mauritian passport you would require visas for lots of countries. Any EUROPEAN countries. Mitch Ask the embassy in South africa relevant information about this. Ask also if you can keep your double nationality . So you can have two passports.
Good luck Mitch
Kayssaven