As Chris has indicated...you might be needing to talk to a lawyer soon.
But first, talk to the dealer. They might be cooperative (if you are
very lucky). If they aren't, then it is time to start the lawyer
wheels. Don't hesitate.

If your engine was really rebuilt only 30K miles ago, this should not
have happened.

I took my Westy into the dealer recently, and now am prepared to
completely swear off of ever using them again. It isn't worth the
hassel. Local auto shops will get the parts faster are less likely to
bitch about a 13 year old (in my case) Van. The dealer won't have
practically any parts for it in stock and won't use anything other than
VW parts...meaning you'll have to wait a couple of days for the parts,
let alone the repairs.