According to the specsheet, Shell Helix Ultra AV-Low-3 (0w-30) meets VW 504.00/507.00 which is longlife specification so technically you shouldn't need to worry doing extended intervals on this oil. The "0w" designation means that its flow performance in the winter is better than the standard "5w" grade but the viscosity remains the same.
If this was done by the main dealer then you should be fine, you'll be surprised what variations of branded oils they use from different branches (can be Castrol, Quantum, Mobil, Shell etc).
Of course if you notice any issues then you should raise it up with the garage but generally it is unlikely you will see a significant difference from the previous oil.