OR Tambo International Airport

I am so angry with the staff from OR Tambo, these people opened my suitcase and went through my things. My cosmetic bag was left open and my clothes thrown all over the suitcase and I know for fact that my clothes were folded and my cosmetic bag was closed. This is not the first time this has happened, back in September of this year they did the same thing to my suitcase. This is disgusting and inversion of my personal belongings. Can the management of this airport deal with this issue urgently. I don't understand why these people or person who do this think or believe it is okay for them to open our suitcases or bags.