Removing a credit

I am trying for months to remove a credit that I did not get credit for. Not only am I not in the movie but I was an extra.

I am sick and tired of the usual response "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. Please see our Help Site for further information or details on how to contact us." Maybe if they had a chat or a phone # I could get direct help instead of banging my head against the wall trying to remove uncredited credits off my page, that I should have NEVER added. I was young and stupid then. Please help me get this resolved because it is extremely fustrating, its my page and I should be able to remove work that I was NOT credited for.