There was a story like this on fb but I don't remember the exact details- I think it was either because the school apparently never received the secondary fee (when the student did pay it) OR because a student called after getting rejected, asked what they could do to improve their app, but ended up finding out that the school had never even actually reviewed the student's app in the first place... OR I could be going crazy in school and be mixing and/or making things up.
😛
It's usually unlikely for them to reconsider though, I'd say. You could try a letter of interest, but usually a rejection tends to be final (unless it was an extreme case like above).