transunion error dispute 3

https://ace-wiki.win/index.php/How_to_Dispute_Inaccurate_Credit_Information_and_Protect_Your_Score

I tried to dispute an error on my TransUnion credit report online, but it kept giving me a useless error code instead of letting me proceed. After hours stuck in their automated phone tree, I just needed a direct way to fix the mistake that's hurting my score.