Most bans are tied to your IP address. If you have a "dynamic" IP (common for most home internet), you can force it to change.
Include your registered email, username (account ID), and a screenshot of the ban notification. how to unban minichat upd
Minichat uses your IP to identify you.
Your account will typically be automatically unbanned once the period ends. Most bans are tied to your IP address
If you are on a phone, disconnect from Wi-Fi and use your cellular data. This provides a completely different network ID. Join as a Guest: username (account ID)