LOST BAGGAGE

I have experienced the worse service ever, my flight is through SAA but with Air Mauritius. I’m on holiday for 5 days only and they have lost my bag,I arrived on 21.12.19 and was told lots of stories, today I called Air Mauritius and they said my bag in Johannesburg and they not sure wig SAA will send it, meaning I’m on vacation with no clothes,does this mean you get to decide whether my bag can come, cause then you should have told me upon check in, I am here with my Fami and nobody cares. Absolutely WORSE SERVICE EVER USELESS AIRLINE