Turbo already defective after 26,000 km!!!

Hi, drive a Leon BJ. 11/2009 with a 1.4 TFSI which now has a good 26,000 kilometers down. Now I noticed that when accelerating in the turbo speed range between the 3 – 6 gear a slight “nick effect” occurs. Now the workshop tells me that the turbo in the Ar…. Can that be after such a short mileage already? Bzw. do they always go over the Jordan in such a short mileage range? MfG