I'm sorry to hear you did not receive your retroactive award. We will submit a request for a financial audit in your case to better understand why this happened.
In the meantime, you can reach out to the Defense Finance & Accounting Service (DFAS) and submit an inquiry.
Here is the website to submit an inquiry to DFAS directly - Customer Service (dfas.mil).
You can also call DFAS at (888) 332-7411, option 1