[how do i unban myself when somebody set a server command that keeps banning me]

The only way that I can think of is to disable command blocks on your server. You could ask someone that can get on server to get on and get rid of it. If that doesn't work you may just have to get a new account or get a new server.

[Plugin Request]

I would like a carpet mod like plugin. This is so I don't have to afk at the farms that I make in my world. I want it just for the /player command. It would be amazing if you added a carpet mod like plugin for that. I know that carpet mod is not compatible with paper servers. I have looked it up though and there are plugins that are like carpet mod.