Hey there Parabol,
Firstly, I have to say that this is not the place to appeal an action of this type. You can go through the support site to see snippets of what you were reported on and appeal the action there.
I want to also address the “why was it 10 days” question in there. Silences and Suspensions get progressively “worst” the more an account receive. They start out short and will get longer all the way up to permanent account/game license closure.
Severity of your behaviour is not directly taken into account so something “mild” ultimately has the ability to be met with a long silence and/or suspension. It’s not what you said it’s the fact that you’ve broken the Code of Conduct again after being warned multiple times before.