Brake discs/covers moved – Vibrating while braking

Hello people! My Ceed, with a current mileage of just under 3500 km, vibrates during braking from higher speeds (from about 120 km/h). Since I already had enough of this for vehicles from the VW Group, I suspect once again very strongly warped brake discs as a cause. With a mileage of 3500 KM it is natural for me that this has to be handled via the guarantee, even if brake discs / pads are a wear part. As mentioned earlier, I had to have such experience before, and as far as the topic is concerned, I am already sensitized, and watch out! It can’t be the driving style, because there were also brake discs at VW which then worked 80000 km without any problems. The salesman and the service technician said at the takeover that I should use the car quite normally, braking is not necessary. My questions to you, specialists or users with knowledge of the material: – Which equipment supplier provides the brake discs + pads for the KIA Ceed? – Is such a symptom known at Kia Ceed, are there users here who have experienced the similar? – …. and can recommend better brake discs / pads? – Can the car user somehow influence the durability of the brake discs / pads (except my above precautions), or is it s tark depending on the quality of the installed parts? – Why does this happen again now, had such a fault picture at VW 3x and every time it was changed on guarantee … would finally like brake discs, which also hold 80000 km! Do not drive like a Formula 1 driver and torture my brake discs. Care for cooling and not constant “grinding” of the brakes / permanent brakes! From that, what else should I do? At VW it was good then, after which I came the 3rd time and so much Is there no longer a proper long-lasting brake? PS: In brief appointment with Kia, but I would like to clarify in advance whether someone with possibly “better” brake discs has had good experiences etc. The discussion round is open. Thank you in advance for the answers!