We ban players from our servers for breaking the server rules. Most likely, it is your case as well.
If there is no ban reason given, it could be that administrator has not edited the report yet, or that your ban was placed long time ago when we did not note ban-reasons.
Yes, and no. We judge each case individually. If this is the first time you were banned and you understand the mistake(s) you have made, there is big chance of your ban being removed. If you wish to have your ban removed, you need write a ban appeal in our forum.