I cannot delete a credit for a film I was not in

I have tried many times to get a film credit removed for a film I was not in. My latest attempt was: #260717-224106-014000 (film is titled Minutes to Midnight [2018], Female Partier [uncredited]).

I have tried attaching screenshots of the credits that I do not appear in, giving the time stamp of the scene it says I'm in (based on the character title and only one party in the film), screenshots for that scene (as many as it would let me load), etc.

I am not sure how to prove a negative - if I was not involved in this project, am not in the film, how can I prove my absence in a way that is verifiable for IMDb? 

Please help! (and thank you)