This is what I wrote to Expedia. As you might expect, I received no reply at all.
"I am completely unsatisfied with Expedia. I booked and paid for a round trip flight, car rental and long term parking through you. My Expedia Itinerary says at the top that "E-Ticket purchase has been confirmed by the airline." On the day of my travel, Delta airlines had no record of my itinerary number but they did have my name. I got through security all the way to the gate - THE GATE - and the airline told me they had not received payment for my trip but would be happy to sell me a ticket at three times the price I had already paid you. Calls to Expedia were curiously unsuccessful. I had to abandon my travel on the spot and return home. This is where it gets good. I spent the rest of the day on the phone as Expedia blamed Delta airlines, and Delta blamed US AIrways (with whom I was traveling on my return flight) and US Airways blamed Expedia. Now, insomuch as I apparently never paid anyone, you'd think there would be no charges on my credit card. BUT NO! I have been charged $439.00 with the added insult of a $150.00 cancelled reservation penalty. Yet I was there at the airport, at the gate, waiting to get on the plane. I was ready and able to travel. I had an itinerary from you that indicated I had paid for everything and was good to go. Yet when a problem developed, Expedia was nowhere to be found and refused to help me at all. You just took your money and walked away. I have called customer service three times, emailed at least once, an have only spoken with people who have difficulty with English on poor phone connections, who simply shrug and say it's somebody else's fault. I feel you owe me a complete refund. I paid you, and yet you were unable to complete the transaction and unwilling to help me when the problem became apparent. It was a waste of time and a significant amount of money for me. Based on my experience with Expedia, I would be surprised if in fact if a human actually reads this, let alone does anything about it. I am considering contacting my lawyer."