Everything

Turbo broke - friend Replaced with banjo, injectors, seals, and eveything that the ford bulletin said. Had back two weeks,then car sounded so loud, embarrasingly noisey. garage had back - replaces cams, head gasket and timing belt and acid cleaned. now MOT garage says injectors leaking diesel. to top it off the car sometimes wont start and there is a knocking noise and the car is sluggish until the turbo kicks it, but turbo sounds like its running on. Any ideas? i really used to like this car!!!