Doing it yourself is the best way, that way you have most control over the POA
Figure out exactly where you went wrong and just type up a bullet format response addressing the issues, and showing the steps you're taking moving forward to avoid the same issues from occurring again
I would only ever say seek help if there is a language problem. I bet most of those guys just have a few cut and paste templates and its only time before Amazon catches on if they have not yet.