Join Date: Oct 2005
Location: Ponte Vedra Beach, FL
Programs: DL PM, HH Diamond, Fairmont Prem, SPG Gold, Priority Club Plat/IC Amb, AmEx Plat
Posts: 10,839
Welcome to FT.
There's no way to switch FF accounts after the miles have been credited. I wouldn't waste any time trying to contact the airline.
As for the 5,000 MQMs short of Platinum, a quick mileage run to the West coast will get you the miles you need.