Hi Melanie, there is no functionality that I know of that will do that for you.
Unfortunately it is the downside of internet trees - once someone gets the wrong information it spawns across internet trees and becomes a self-fulfilling prophecy.
The only way to get rid of it, that I know of, is to manually contact everyone who has it wrong and detail the evidence to show that it is wrong. Even this may not work for a multitude of reasons
1) they may have left the site
2) they may be unwilling to change their data
3) they may disagree with your findings and hopefully have a debate with you about it.
I have tried this for many years for sites that say my mother died in 1970 when she is still very much alive today.
My suggestion is to write a report outlining all of your research and why Geni is correct (and the others wrong) and including that in the overview of the profile. (Also attach it as a document). A well written report might, over time, make the others change their trees.
Leanne