Before you vent your spleen, could I suggest a nice letter asking politely for a refund of the fees? Tell them how much you like their services, how often you fly with them - and that you would like to fly with them in the future. You catch more flies with honey than with vinegar. (Many airlines respond to 'I'll never fly with you again' comments by ignoring them - what do they have to gain, if they have already lost you as a customer)
Also you might want to check flightaware.c om to see what actually happened to the specific EI flight. If it was late you could also argue that you saved them the connecting expenses they would have to have paid.
Good luck, and let us know how it goes.