I am a Meeting Planner in California also. I had 50,000 points given to an attendee of a meeting I planned @ the Teaneck Marriott New Jersey. I signed all the contracts and included my MR #.
Even though I protested to the Director of Sales and sent a nasty survey to Marriott, I was not compensated. I'm still burning!
Perservence is the name of the game. I would escalate this to the folks in Salt Lake at Marriott Rewards--there are people there who only do Platinum problems and they might be able to help. Most likely you'll need a copy of the bill, showing your rewards number, and any other supporting documentation. This is similar to the "Missing stay" request form on Marriott.com.