I called them immediately when I noticed the difference. They just quoted the new price, matter-of-factly. However, she did cancel the pricey ticket and reissue me a non-refundable which was VERY close to the original discounted price. Not ideal but fixed the issue at hand, especially as I was riding in the upscale ground transpo to the airport I use when I have excess deviation bank!

Without the screen shot proving my initial purchase I didn't have much leverage. Hence, my initial point/suggestion.