I would ensure that the carpet company and the installers are aware of my dis-satisfaction with the seams. I would in writting describe what the problem is and an accompaning picture is that is possible.
This way, you have the complaint lodged just in case.
Then I would set up my office and find a high powered vacume cleaner, like a 12 amp dust devil sort and just vacume the seams and adjoining areas real well. Do this often. See if this will bring the knap together and hide the seam to an extent.
Once it lays out, maybe it will be not so noticable.