The Technician stole my car spare wheel.

My experience with Car tracker is as bad as hell, I don't even trust that if my can get ****** it can be recovered because the very same technicians are those who steel. My story is as follow, This last Sunday the car tracker technician came to my house to fit the device, he arrive around 8AM work till 13:PM, as I also chat with him about taking such a long time to fit the device and he told me that during weekend he take his time to fit it as they claim overtime. Then I went back into the house as I suppose to give him his space to work. My son went to shop to buy something and when he came back enter my gate he notice that my car spare wheel was rolled down on the chain under my bakkie and just assume that the technician is still busy installing. After all the technician call me to come and sign paper work and he left, suddenly when we check my spare wheel was no where to found, When I call him he said the spare wheel he took out is the one of his bakkie because it was disturbing and inside of his tool box. Mediately I call his manager then they promise me to take the technician to polygraph test and if he fail the test the company will take step against him and if he pass the test I have to pay the polygraph test company myself. And I'm still waiting for the results...