Allegiant Air has the absolute worst/unreasonable customer service department. I booked a flight on 4/23/13 for travel on 8/7/13. A problem came up with my travel plans and was forced to cancel my flight the day after booking. I spent hours trying to get into contact with Allegiant Air's customer service department but was continuously told by the automated system that call volume was too high. I then attempted to contact them via their web based email system. They responded hours later that they could not help me and that I needed to call the same number I had been attempting to use all day to contact them. I finally got a hold of them that evening and they said that since it was past the 24 hour period I would not be able to receive a full cash refund. I have been battling them through my bank and have been unsuccessful in getting a cash refund. Now I am stuck with a flight voucher that I have NO use for and I am out $339. What a frustrating nightmare. I will NEVER fly this airline again and I will continue to use every opportunity to shy my friends and family away from this Airline. I have never in my life experience such a disregard for reasonable action, ethics, and even the bare minimum of customer service. I hope it was worth the $339 Allegiant!!!