You were spamming the shoutbox constantly with rubbish and inappropriate messages.
I mainly think you were telling us stories about how bad your life is and all the problems you have in order for high staff to sympathise for you, and in turn, get unbanned at a faster rate.
The shoutbox is there for talking, yes, but within certain boundaries.
I believe you crossed those and the ban was correct.
I'm not sure of the length of the ban but let this be a lesson when it comes down to the things you were saying.