By disconnected, I am guessing you mean banned forever. The way to fix that is make a new windows live account, wipe your xbox, and make a new xbox live account.
YES
I do want to get all the achievements but i have xboxlive but can you tell me how to get all achievements in halo 3 in xboxlive.
in your dashboard
Yes.
no
Well, You cant play as guest and have free xboxlive unless there is another account on your xbox360that has xboxlive and playing with you
i dont no
LickMyBigMeatyRim
Yes
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$7.99 per month
how do i connect to Xboxlive in Jamaica