Let's try to summarise AG's beef, removing the invective.
- He booked a ticket, without double checking the date before pressing 'continue'
- He then receives a 'service' that seems not dissimilar to what many pax experience when trying to make changes with some low cost carriers
- I infer from the that he also received a refund, which some may feel makes him rather luckier than others in a similar position with other carriers
I think the correct words should 'mea culpa', for everything appears to have flowed from his negligence in failing to double check the dates before making a contract with the carrier.