Someone keeps adding themselves as a Producer on my film when they were not a Producer. How do I stop them?

I am the director-writer-producer of a newly completed film listed on IMDb. There are 3 people who keep adding themselves a 'Producers' on IMDb, yet none of them had anything to do with the film's production and none of them appear in the film's credits anywhere. The film was completed without their knowledge or involvement. They are simply owners of the company that is the US distributor, and yet they keep adding themselves as official "Producers'. Despite having them removed, they simply add themselves back on again.

How can I stop this from happening? They have no right to list themselves as Producers. It's absolutely false.

Matthew