We had our bathroom redone, all walls are new, they plastered but we have noticed a huge crack along edge of wall where it meets the ceiling. Contractor said use caulking and then paint it, well caulking has now bubbled and crack is still there, any susggestions would be greatly appreciated.
Your contractor should have taped and plastered. If he didn't tape (which I suspect he didn't) cracks in the plaster are likely. Caulk is not the right way to fix this. You can either sand - tape - and replaster, or put up some decorative molding.