King Shaka staff has ****** from me and Rennie the manager is pathetic at customer service

We returned a car to the King Shaka Airport today. We left some valuables in the car and just before boarding we called Dollar Thrift to alert them to this. The Manager, Rennie, could just not be bothered. We kept calling back and their story changes with each call. They claimed not to have seen anything, they would say they are still investigating, they would say they are very busy hence they haven't attended to the matter. Three hours later we still haven't heard from them yet with each call we made they promised to call back. After three hours they said they only saw a diary; the diary was the only item of no value but why did it take them three hours to find the least valuable item? They used the three hours to think of BS to tell us. I say this boldly, the staff at King Shaka International are *******, they stole my valuables. Rennie says she will 'investigate', there is nothing to investigate this is her way of brushing me off. She has been brushing me off all day, saying she is too busy to ask her thieving staff to return my goods which I left in their car. In the last week we rented two cars from Dollar Thrifty, one at PE Airport and the other in Durban, I know we will have a tough time getting the deposits back, but that's a story for the coming weeks. I want the King Shaka staff to return my ****** goods and for the manager to have a little interest in her job