I called AA and the rep told me what was available for a certain date. I had told her that I wanted to travel the day before Thanksgiving and return that Sunday. She, for some reason told me that the dates of travel would be Nov. 20 - Nov. 24. Obviously these dates are not Thanksgiving weekend but it's the week before. I had no idea because I didn't have a calendar in front of me (ultimately, it's my fault for not knowing the dates). Well, after the ticket was booked I called their customer service office, I was told that if I wanted to change my flight, I would have to pay the difference in fare ($200) plus the $100 change fee. What the hell!!!????? I argued but the supervisor (Pam) didn't want to help me out...

What can I do??? I already booked another flight through expedia.com for the correct dates. You think I can dispute this charge with my credit card company (MBNA-mastercard)???