LOST BAGGAGE

I was travelling from OR Tambo to Polokwane on the 11/02/2018, my flight was scheduled to depart at 16:30. I checked in without any problems and was asked to go pay as m luggage exceeded the kilos allocated to me. I paid as i was expecting that, upon our arrival at polokwane the most important baggage that had study material was missing. I then inquired why and was given a long story that someone in Johannesburg made a mistake. To cut a long story short how dare to i go to class without material? No one bothered to call and apologize to me, there is no way that they did not see that one baggage was left behind. We tried to call Johannesburg and we were told that they have knocked off. This is poor service and it might have a financial impact on me as i don't have material for tomorrow morning. As a customer i am now stressed due to their staff neglegance