Sending Transcript late to UT Austin

Hello,

I recently applied to UT Austin and all documents needed to be sent in by 12/08/18. Sadly, I requested through Naviance that my transcript be sent on 12/06/18 and they received it on 12/10/18, I don’t know why but my school took to long. On my account, they said that would not consider my application and when I filed for an appeal, they denied it. Is it my fault for my transcript being late, and should I try to file an appeal further explaining my predicament?

Please, if any, I would appreciate your comments.

Thank you