As I understand SBC, you cannot "reset" the pump until you get a warning message. You then have to hook the car up to STAR and read the fault code to see how to progress.
If the code is C249F, there is a possibility of resetting the pump actuations, but this isn't cast in stone. Some indies can/will do it, I doubt a main dealer would.
If you can't reset the pump, you'll need a new one at around £650 + labour if you source it yourself. Around £1200 - 1300 at the dealer.
Hopefully an indy will correct me if I'm wrong.