Yeah i am. I never had experience with the issue like yours.
If the link is not available visibly anymore for anyone else after you removed the link i would change the sensitive the personal information so that the old info can’t be used against you. If you attached a file to an actual comment, you can just delete the comment however you mentioned that you added the file through link so i don’t think that’s the issue.
i’m sure that you somehow can break that link. I’m not sure how you uploaded that link but for example in my case (i use Dropbox often) when I want to disable the link or just remove it from being accessible, I delete/move/rename the file from it’s original location.