Hi I'm peter and I'm just wondering if I'm being treated right and bmw to start off my car needed a valve seal repair. So my car as been at bmw for the past 3 weeks now dis past monday but when I talked to them on Thursday they told me they'll get started on it on monday which was 2 days ago and then im bein charged 3900 for the wrk how do I know I'm not paying more or if there's anything I can do to pay less since it was there for 2 weeks till they started doin anything to it? Help plz