Sad to hear that the calibrator was not familiar with the set. The XX_X_Coeff parameters are the ones that should have been used. The procedure is not trivial though. You generally have a choice of turning off CCA and leaving it off, then adjusting those parameters or doing the CCA calibration which involves turning it off, measuring the primaries and entering your target white point in the CCA menu, then turning CCA back on with a little bit of follow up tweaking to follow. I found on my particular chassis HL-P5063 with firmware 1014, leaving it off allowed me to get the best color decoding, etc. That basic procedure is described in the service manual which your calibrator should get ahold of.
I wouldn't be upset with him, but would expect him to learn about your set and redo it. Samsung is putting some pretty powerful stuff in their service menus, but how to use much of it is not well understood, even by the calibrator community, but we are working on it!
If he wants to visit www.isfforum.com
and sign up there, there is information available to calibrators there that should help him out.