Thanks Christina,Chris in NC it appears that the reservation was made on 1/21 and the hotel notified the traveler on 1/22 so it seems like less than 24 hours.
My guess is that the rate calendar had a problem -- as of now the hotel is sold out. Yes the hotel rates are elevated for the Super Bowl and have been since December -- even the Howard Johnson at the airport is over $400 per night that weekend.
If that is the case, then no, I do not feel that the OP has much recourse, unless, Georgia consumer law dictates otherwise. It would be a much different scenario if the OP had made the reservation weeks or months in advance, and then received notification recently. If the reservation was made on 1/21 and the notification came on 1/22, given that this was super bowl weekend and the rate was significantly below market value, I do not feel that the hotel owes the OP anything.
I will reiterate I do not know Georgia consumer or hotel law. However, just like we ask travel providers and suppliers to be reasonable, it goes both ways. In this situation, the hotel made an honest mistake, it was corrected and the customer notified within a reasonable time frame. My advice to the OP is to let this one go, and look for another property.