Had 9 Seats over the last 12 years, 3Ibizas,2 Cordobas, 2 Arosas
Mk1 Leon and an Altea and only had 2 real problems, A sensor went on an Arosa and had to have a loan car under the warranty and a speedo cable failed on one of the Cordobas, again fixed under warranty. If they were sh*** I wouldn't have kept buying them. When I bought a Picasso instead of a Seat,I had nothing but trouble with it for two years, it always seemed to be going in for something, alternators, lcd displays failing three times, couple of recalls, engine mountings failing, and the build quality wasn't a patch on the Seat. Traded it in for a
Leon Mk1 and enjoyed two years trouble free motoringbefore changing to an Altea 1.9tdi Ref Sport in Jan 2006. Best car we've had.
I am a shift worker on a chemical complex just outside of Middlesbrough so need a reliable car, whatever the weather in the winter none of the Seats have let me down and we get some pretty extreme weather during the winter months. If they are looked after they'll look after you, I have a suspicion yours might have been thrashed over the years. If you need to change bits there are always the breakers yards and specialist independant VW parts suppliers that supply any part you require for less than the dealers ask. You never know you might get the bug and start bigger custom projects.
Hope you sort it out.