Replacement of valuables in vehicle theft?

Hello to the round, as you might already be able to read in the Lexus forum, my 4 month old new car was organized in front of the door “tossed away”. More about this a door further in the Lexusforum. I would be interested now, to whom I have to turn legally in matters of “values” in the car. In addition, the objects were not consistently in my property. So a laptop from me, but a Digicam from an employee. Invoices are of course all available. W In the end, I would be interested in the loss of a special payment in case of theft. The leasing contract itself is obsolete, but what about my special payment at the time? I thank you in advance, Filou