Hope they sort yours quicker than mine, lost mine for 8 weeks while they replaced every bit of rubber on the roof/windscreen frame/boot lid, twice! Water tight now though.
The vibe I got is that the retailers dont really get much support from VW on the water leak issue, plus as the rubber seals are constantly being revised in order to combat this ongoing problem, nothing is kept in stock.
My car spent most of its time sat in the carpark waiting for parts.
Mind you I had a blast trying out all the loan cars! The jetta diesel was nice (fully loaded). The golf estate was great when I had to move loads of stuff to the tip. And the tiguan was a pleasure to use, my wife wanted to keep it! That saw a few dirt tracks I must admit, he he he he!