When I press the clutch in the engine vibrates... I have had the clutch replaced and it still does it !

Did the engine vibrate, when the clutch was depressed, with the old clutch? Was the pilot bearing and the release bearing replaced, when the clutch was replaced? Was the correct clutch kit installed? Were all bolts torqued to spec? Did the mechanic warranty the work?

If everything was done right, the problem may be with the Dual Mass Flywheel (DMF). They have been problematic and haven't lasted very long. Consider the pros and cons of installing a solid flywheel (LUK or Performance). My bet is there's a problem with the DMF.