US Airways Lost Luggage and no one can locate but they are not helping me for compensation of my items. Baton Rouge Louisiana

I left out of Baton Rouge Airport on July 25, 2014. I had connecting flight to Charlotte North Carolina. When I arrived at my destination in Miami, I went to baggage claim and my luggage wans't there. I went to the baggage claim and reported my luggage missing. The clerk was very rude and took a brief description of what my luggage looked like. I was giving a claim ticket and was told to call delayed luggage number. I called the entire time I was in Miami but everyone I talked to could not locate my luggage. One supervisor by the name of Barbara Weaver told me that my luggage was probably crossed with American Airlines luggages. I just can't understand how a company merging can't keep up with luggage in a computer system. If it's going to be this difficult to handle they should not merge. I had nothing to wear the entire time I was on vacation. I had to purchase new clothing and other important items. Today is August 7, 2014. I have called everyday concerning my bag and have been told to call back and keep checking. I rather have all my clothing and luggage. However, I would like to be compensated for all my items and my luggage. The worst thing is I had to pay to have my luggage put on their plane!! I need some answers and like right now!!