Forum rules:
25. Ban evasion (using or creating accounts while one of your accounts is banned) is not allowed.[e]
Examples:
25. If you get banned (temporary or permanently) and create a new account to continue posting / sending PMs, it's considered ban evasion. The only exception is creating a thread in Meta about your ban.
Q: Why was my account banned?
A: You probably have broken one of the rules. Try emailing a message to the specified appeal email shown in your ban message.
there you go, all listed in that sticky post in this Meta subforum. the exact step by step appeal process is never posted before
but if I may suggest, you'd better just undergo the ban... wait 7 days and don't repeat whatever you've done before