Question: correcting dependent on disability claim.

Hi! My rating came back. VA granted me dependent status for one child but not the other. Looks like I had a typo in his DOB on one of the 2 forms that had his DOB. So now I need to figure out what to do to get that fixed. I submitted the corrected forms and the second child’s birth certificate during a deferred claim review. They decided the deferred claim and did not change anything with the second dependent. Do you know how I get my second dependent added? Thanks!