Lack of power at 60 mph

Hi all just had my td4 serviced at weekend and not used it till today.went to work this morning no probs but on way back got to 60 and no power with my foot flat to floor,no warning lights etc just no power.could this just be with the filters,oil etc being changed?will it sort it's self?any advice?cheers in advance

Take it back to the garage that serviced it.

Any other symptoms, black smoke or misfire ? As previous post I would take it back.