Just thought I'd add...
if American Holidays does not offer either what you had ordered or a satisfactory alternative then tell them immediately- no-sorry I'll go for a refund from the Commission for Aviation Regulations.
Also, if they haven't contacted you by,say, Tuesday noon I'd ring/visit American Hols and if not happy ring/visit the Commission for Aviation Regulations in Earlsfort Terrace.
(substitute Globespan for American hols if you had booked a Globespan flight)