The main problem here is that both CoE and Discord said in their Terms of Use : Terms of Service : "By using Soulbound Studio Services, You acknowledge and affirm You are at least 13 years of age." "By using or accessing the Discord application (the “App”) or the website located at https://discordapp.com (the "Site"), which are collectively referred to as the “Service,” you agree that you are 13 years of age or older"
Since you're twelve, they banned you from the official discord to avoid any problem with the platform.