If you got double charged on the AMEX, then the best and easiest solution is to dispute with AMEX. AMEX is the best CC company out there for such issues. Visa and Mastercard will make u fill a dozen forms and then want every copy of everything via snail mail. It takes abt a month to just finish thru their red tape. As for AMEX, I am one of its most faithful customers. IF I was you, I would not evern spend another minute calling the Hotel.