I created a show I'm staring in but have been left off the cast list . I have submitted several up dates and they go through but not me as a actor. My director is acting in it and they put him up but still not me?
IMDb tends to be more suspicious about single credit additions.
If you are far enough along in production and are certain what the on-screen credits will be, then, if you haven't yet done so, create a submission that updates all the cast currently on IMDb with the Order Number, plus adds your credit (including the appropriate order number). This will indicate that you are more likely working from a full credit list, and they may be more likely to accept it. (It will also improve the IMDb page.)