New tires – Driving noise – Complaint?

Hello motor-talk-friends, I bought four new Dunlop StreetResponse tyres for my Golf VI a few days ago. Since then, while driving (between 40 and 80 km/h) I hear driving noises like in a subway, a kind of singing, that makes a whirl. The Golf VI is really very quiet in itself and even the tyres that were on it were not heard at all. And now this quality loss, I am totally unhappy 🙁 Yesterday I was at the dealer’s office. I would have to buy new tires in order to be able to send the Dunlops for the complaint, but may take up to half a year… Apart from the fact that I still have winter tires at home, which I could pull up for so long, he also said that such a complaint has no success according to experience, because the tire is “all right” in itself and it is probably a subjective feeling. I am totally angry if you buy something else that doesn’t like or lacks And here you have no chance at all? My question: has any of you already had such a problem and knows whether a complaint is worth it? Thank you in advance. Andreas