Incorrect credits

I have been trying on and off over many years to move/remove dozens of incorrect credits from my page https://contribute.imdb.com/updates/edit?edit=nm0550825/filmography&ref_=nm_flmg_edt . There is another David Marshall in my field that I believe these belong to https://www.imdb.com/name/nm17672848/?ref_=fn_t_2 who has had an illustrious career and worked on many of the projects that inspired me to become an animator in the first place but these are not MY credits, I would have been eight years old for a lot of these. No matter how many times I submit corrections or requests they are constantly denied. I've been in multiple interview situations where people mention I'm much too young to have worked on these projects, some going so far as to imply I've intentionally mislead them, and it's getting embarrassing at this point.