Venetian Marble

He came and we picked out the slab color that we wanted.  He came to do the job, and we noticed the slab that he brought to replace the wall with was not the same color that we first picked out.  I stopped them from putting this up and explained that this was not the right color because it was too white.  He told me that it was this color because it as freshly baked and then it would oxidize and turn the correct cream color that I first picked.  It did not turn the correct color and now I am stuck with the wrong color wall and tub.