Loss of luggage due to negligence

I was traveling with my friend from Bloemfontein to Bellville, we loaded our luggage in the trailer and when arrived at our destination, our bags were nowhere to be found. When we asked the driver, he said we should go to Cape Town to fill a form and did not explain what happened to our bags. When we got to Cape Town, the driver said the trailer was not locked and he suspects that they were stole in Bofort West. We also noticed that the drivers do not check/take the luggage stickers when handing over passenger's bags, passengers name the colour of their bags and are given bags. We filled the forms, and they said investigation will be conducted and we have not received any communication from them. Everyone at the station and the bus driver did not care about our loss due to their negligence.