Jack up the car, free off the pads from the calippers, then put wheel back on with two studs, Get some garden hose pipe, put a funnel on the end. Spin the wheel, hold hose (funnel end) as close as possible to the central area after pressing out the VW badge from the centre of the alloy, and without touching, the other end in your ear. The funnel will amplify the sound and you will know.
If you can't hear the difference, then the bearing is OK.
One other check is to get hold of the wheel and check for play side to side, by pushing with your arms, one side of the tyre and then the other, hands have to be on opposite sides of the outside of the tyre to detect this.
What kind of technician at the Dealer is that ? You've been talking to Service reception - and not the blokes who are trained !