you can repair it yourself.
depends whats wrong with it tho.
mine packed up and I stripped it down and regreased it and put it back together and hey presto. although i got mine when it first seised up so it was repairable if yours has been stopped for a while u will need a new motor. pop down to your local scrappy and pop one off from there. pull off the plastic panel on the bootlid by following the tips on the bravo-guide (the bit about fixing the washer at the back). disconnect the power plug and then unscrew the 3-4 allen key bolts and take out that way. you will need to take the wiper off before this tho else the motor wont come out
new one goes in reverse to those steps.