My Credits Keep Getting denied

Hi all, I'm not too sure what to do or what I am doing wrong.  I was in 3 episodes of a show and I am only listed for 1 episode.  I have tried to add my credits by editing the page and Add Credit, but then it gives me a warning that "I am trying to add a credit for a show that is done".  So then I write an explanation.

I was in 3 Episodes. Just like Preston XXX (my real life brother. We both play the young kid versions of the main characters. We are both in 3 episodes. Preston is listed for 2 (not 3 for some reason) but I am listed for only 1. (Episode 1, Episode 3 and the Last Episode).  If you provide me with an email, I can send you the official agreement from production for each of the three episodes. We need this to be reflected on his profile, please.

This is the reply I get DECLINED:

ReasonUnable to verify.

Your contribution has been declined.We have been unable to verify your contribution.

Unfortunately, we were unable to accept your submission as we were unable to verify the information provided.

If your submission was placed via the IMDb.com Desktop title or name page submission form, you now have an option to provide evidence with your additions, as well as corrections or deletions. Please go to your Contribution History, re-load the submission reference and tick the box “provide an explanation to assist in processing this submission” and “check these updates”. The field will become available in the submission form. Please include evidence, or provide a URL which contains supporting evidence within this field.

How can I get this fixed?