1999 Jetta

Has anybody had problems with the 99 automatic transmission? It revs to 35-40RPMS and then “thuds” into next gear. This began with only 45K on the car, so VW covered replacing the tranny. Problem is, the new one is doing the same thing. Also, AC has gone out (keeps freezing up), moonroof started eating the material from the ceiling of the car, trim around doors started coming off, passenger door handle fell off, interior fininsh peeling off, cover for the moon roof fell off, drink holder fell off, stereo suddenly had NO reception, trunk CD player never worked, and I still owe money on this. Is there anyone at VW that handles these complaints? I looked up the vehicle on Carfax – but it came up clean.