Question regarding installation

To whom it may concern:

I just had Verde Butterfly granite countertops installed in our kitchen and
noticed that it is cracked on both sides of the cooktop cutout.  I noticed
the crack before the installers left and pointed it out to them.  At first
they insisted it was a natural vein, but after some discussion they conceded
that it was cracked.

I've attached 2 photos of the cracks (easy to see in high resolution photos,
but may be a little difficult to see with the reduced resolution
attachments).  The piece is 92.25" long and 25.5" wide with the cutout
positioned 39" from the left (facing the wall) and 25" from the right.  The
distance from the bullnose to the cutout is 3" and from the back 2.25".

It is important to point out that the first piece with the cutout broke
exactly where the crack is now and was replaced the same day with the now
cracked piece in the photos.  Even after the installer sanded and filled the
crack with resin or epoxy, we are not happy with the crack and our trying to
resolve the situation .  The installer said that he would only replace the
piece if it is seamed on both sides of the cutout because they already broke
the first piece and cracked the second reinforced piece (basically insuating
that if we insisted the granite be replaced it will look worse with the two
seams).  My wife and I are at the point where we don't know what we should
do.  Any advice will be much apprecieated.

Thank you,

Robert in San Diego