After you file

From the question, it sounds like the OP already went through that process since the OP said "I sent all of the proof that I could. I don't agree with the out come..."   That sounds to me that the OP did follow the appeal directions and sent what the OP thought was the supporting information for his/her claim and it was denied.   To me, that calls for professional help/advice if there is a large amount involved.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**