Encourage ******* parts use by franchise owners.

CSC used pirate parts which caused damage to my car and refused to refund me after I refused to return my car for the 4th time for them to fix the problem. Even after having the parts inspection done by a manufacturer of the parts. And having two people come forward with similar accounts of large amounts of money being paid over and work never being done correctly, resorting to paying someone else do the repairs bith times at a fraction of the cost they had been told to pay by CSC.. and the Holding Holding company stands by these practices refusing to do anything about this problem. And saying its my fault for using a third party. I should just have continued to take the car there and just pay every time they break it! I have a rare sports car which they have destroyed! Please someone advise me on how I can get them to be held accountable for the negligence they knowingly accept and force the south African public to accept?