Since u mention about AMEX i think u haven't book with asiarooms right?
As i try to use my AMEX once with asiarooms but they don't accept it.
Can u tell us which Tristle u mention about? can u help provide the address so we can try avoid that hotel.
But if it's the one HideAway mentioned about, i'm pretty sure there might be some misunderstanding b/w u and the hotel cuz i found it really nice.