A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
One suspects whether the downgrade was due more to the use of LNF than the OP's late arrival. One might begin by reporting it as an additional LNF violation, which AFAIK does not permit the hotel to punish the winner by a downgrade to the room type corresponding to the final price paid.