They don't do unbans. It's your responsibility to check whatever you do isn't against the anti-cheat policy. Creating another account is ban evading which is against the policy. 7 days is fine and you could had just waited your 7 day ban but created 4 alt accounts to increase your ban.
https://plutonium.pw/docs/anticheat
Upon detection of a Cheat:
Automatic ban of 7 days is placed onto the account.
When the player tries to login, they will be displayed a message which tells them they are banned and also tells them how long is left until the ban expires.
Attempting to bypass the ban in any way will lead to further restrictions.
Once the ban length has expired, the system will automatically remove the ban.
If the player is caught cheating again, the system will ban the account permanently. We will not provide any information regarding any given ban, remember you broke our rules.
