Coating then wind noise

Hello Have there a no problem with my VW workshop, And that is the car was painted a week ago! All 4 doors and rear flap new. And now he makes from about 120-130 km/h clearly audible wind (flow-cheek), Until 260 no difference! Do you have experience there, I am sure it was not before! Had only stress because after the vehicle was picked up about 10 min later at home I wanted to check everything! Did not get the back flap open any more! So again to friendly, after long discussion and threatening, then finally cost take over of the shot tail flap ECU. That also worked before! And now with the wind noise! Do you have experiences with this? Or do you know a competent VW workshop in the area Bayreuth Bamberg? Because mine I think I am completely overwhelmed with nemphaeton!