I have good news and bad news. The good news is you do have an option: go back in and request an appeal. Even though you initially denied, most commands will usually allow it to go forward. AR 27-10 allows up to 5 days for an individual to determine if they would like to appeal. Then you must submit your defense to the Battalion Commander. He can then determine to let the punishment stand, reduce the punishment, or totally revoke the punishment. A total revocation is rare but they do happen if you can prove you were correct or that the punishment is too harsh for the offense.