How do I get someone unbanned that I reported?

Your friend would have to go to enforcement.xbox.com and file for a case review.

The enforcement team is the only ones that handle suspensions (putting them on and taking them off of accounts)

The case review process is the only way to contact enforcement to do anything about taking a suspension off of an account.

It's only possible to file a complaint via the console.

For Reporting on Xbox Console you need to follow there steps in this link
support.xbox.com/.../file-player-complaint As said before make sure you only File Complaint if the Xbox LIVE player has violated any of the Xbox LIVE Code of Conduct.

It's best to create a new thread instead of bumping an old one.

Filing a complaint via the console is the only way to have the enforcement team investigate him. They investigate every complaint thoroughly. It only takes one valid complaint in order for them to take action.

If you have done nothing wrong, you have nothing to worry about if he does file a complaint on you.

there is a man on xbox 360 who threatened to report me for cheating in a game via mods - I do not have modding software/hardware in my possession, therefore it is impossible for me to do so - I cannot reveal his gamertag, but is there anyway I can get authority
to take note of him? other than reporting him on my xbox live account? reporting him on xbox live account is nothing unless a large number of people also report him. 1 vote means nothing. BUT, if I explain the situation to someone with authority, maybe I can
get something done. even if its just making sure his false claims mean nothing.