TOOK TO THE DEALER SHIP AND IT IS STILL COSTING ME A ARM AND LEG . WHY ISN'T IT A LAWSUIT OR RECALL ON ALL RENDEZVOUS!!!!!

This vehicle has been giving me problems since I purchased it. I am unable to drive the vehicle for a long period of time until it shuts down completely while driving. Every mechanic shop I take it to states that that they are unable to detect the problem and take it to the dealership. As of May 14,2017 the vehicle is not running it won't even lock or unlock my doors. It only responds when the fuse box is being moved. Out of options not sure what else to do. Need help with this problem.