Ok....

The dealer switched the n75 valve yesterday and when I drove home yesterday it was still poor in performance. Went back again this morning and dropped the car off. Just been back to collect the car, and the bad news. They tell me the turbo has failed, and being that the car is older than 3 years (it is 2001 Y), Skoda won't do any deals on prices.

Therefore:

2.2 x hours of labour =

Maybe it's time you go for an after market bigger turbo no? Warranty is out so they shouldn't have a problem with it, plus you'll get better performance.

No idea on prices though.