There's no Epic support ticket for HWID unban. Hardware flag is separate from account appeal.
Fix path is spoof + clean traces + new account. Appeals work for account bans, not disk serials.
Some ISP-level flags exist but they're rare. If spoof + new account still insta-kicks, try different network once to test.
Document what you installed the week you got banned — sometimes it's a leftover cheat driver, not Epic.