The same thing happend to me the first day i bought my mk4, the regulator cable broke and my window wudnt go back up.. regulator repair kits on ebay are about 10-15 quid but there is a vw breaker here in nottingham(east midlands) who you may be able to get the lot off:
Unit 2
Church View Industrial Estate
Basford
Nottingham
NG6 0GA
Tel : 0115 9791121