You can reach us at email@example.com. Answers to additional frequently asked questions are available here. Regarding booked flights or hotels:
if you booked a flight directly with an airline, speak with the airline directly. (Just don't mention hidden-city ticketing or they might not help you!).
if you booked a flight through one of our partners, speak with them.
for hotel bookings, email us with your booking email and Trip Number.