Why was I FNC'd

I got unbanned and an email saying so but its been over 24 hours and my account isn't restored to the original gamertag and is still permanently banned what can i do about this

You would have to go to http://enforcement.xbox.com for information as the enforcement team do not use the forums. The code of conduct/terms of service you agree to when you sign up is the warning.

I always have a laugh when people are like "I'm not renewing" or "I'm going to Sony!". You just look like a child saying silly things. Get over it. You got FNC'd. You're being so ridiculous because you chose a bad name and, as such, were taken care of. I
will agree it sucks as I always have, but it's done and you just need to move on. Whining on here will not change anything my friend.

I am assuming you were FNC'd because of the blatant drug reference in you GT which is highly inappropriate and against the code of conduct.

"Don't create a gamertag, profile content, Avatar action, Avatar content, or in-game content that other users may be offended by. This includes, without limitation, anything related to or suggestive of: profane words/phrases, topics or content of a sexual
nature, hate speech (including but not limited to racial, ethnic, or religious slurs), illegal drugs/controlled substances, or illegal activities."

But you can post in the suspension forum to get an official answer from the PET.

forums.xbox.com/.../41.aspx

It says your gamerscore was reset for cheating, so I guess you got caught cheating.