the first 7 day ban was for triggering the anticheat: https://plutonium.pw/docs/anticheat/
the second 7 is for logging in with a second account (which is viewed as trying to bypass the ban)
i saw you posted this exact same message under a different username so there is where your extra 7 days came from (2 accounts)
the only thing you can do is wait out the ban and don't make anymore accounts or it'll just keep adding time.
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