Is the dealer going to give you the money back for mis-diagnosing and not fixing the problem? Swapping out parts until hopefully something works right is not how you fix a problem.

Can you tell where the vibration is coming from? Up front, rear, steering wheel? The tires should be road force balanced for sure and make sure they do it correctly-show you the numbers-any tire with more than 15lbs it should be replaced.

Once the tires are ruled out-check for bent rim, etc-the road force test will show a bent rim-then you need to locate the source of the vibration. Most competent dealers have vibration testing devices that have sensors they place at various locations on the car. This will locate the area and frequency of vibration. Then they can narrow down the culprit. Bent driveshaft, etc. Again, just replacing parts is not the proper way to fix something and shouldn't be tolerated.