If it is tile, they should be able to fix it with minimal materials, try giving them a call. I don't think they will have to redo the whole countertop, just the area around the sink, since it is still fairly new, the tile should still match. Worth a call! good luck! I think this will bug you, it would me, better to let them fix it now.
another thought, if the people the insurance co. sent to put in the plumbing didn't line it up so the sink would hook up to it center with the window like it was, you may be able to get the ins. co. to fix it.