They ***** car parts

I took my car in for a service the stole my brand new disc brakes. I didn't tell them prior I had the car checked and knew exactly what was wrong with it. I replaced all my 4 disc brakes last year in December, they told me they were worn but they probably changed them with old ones. I'm never using car service city. The branch I used was in Rustenburg. Now I'm wondering what else did they *****.