I don't think you can get your money back. However, all of my family has asked me to draft a letter which they will sign (my children even gave money) explaining to the Red Cross why they feel double-crossed. The letter will explain that unless a significant percentage (some < 10% for overhead) of the money donated to the Liberty Fund goes to the relief effort, primarily the victims, then we will never give another penny nor drop of blood to the Red Cross.
I suggest you do the same.
Shalom.