Okay this time i got banned for 365 HOURS! THATS LIKE A WEEK! And i wasnt even doing anything! I was just playing mf while at the same time another game, and then i go back and see ''You've been banned for 365 hours for the following reason: IP BAN'' or something like that. I really want to get unbanned since i did nothing wrong.
If you are using either a proxy or VPN (Virtual Private Network) that other people may also be connected to, it's possible that your account hasn't been banned but the connection has been. Try disconnecting from the proxy or VPN and logging in again. (quoted from the why am i banned thread.)
Or, if you are using a vpn it hides your actual IP address and thats why you may have been banned.
If you actually dont use either one, you should contact a mod to find out which mod banned you and then talk to them if it is a misunderstanding.
Thats all the tips i have for you so far, but you should check the first situation first as that is more likely than a misunderstanding by a mod.
Good luck!