Help!  We clearly have the wrong top to this piece.  Not only are the pre-drilled holes incorrect, but the picture isn’t the same.  Page 16 of the manual has top with 3 sides.  Our top (item G) has 4 sides. And the dowels and screw holes are all mixed up.  The cabinet is 75 together already.  Do I have to disassemble to send back  I’m so unhappy right now.