You can find the rules here:
http://forum.warmane.com/showthread.php?t=65037
Title of the forum thread shows when the rules were last updated. You should check them sometimes.
Depending on what they said, it might not be against the rules. If you add them to ignore list and then they decide to bypass it by using other characters, you can report it.
Warmane has never sent emails to players about any kind of news.
You can make a ban appeal using support system on website
here but ban appeal tickets are lowest priority and usually take about a week to be answered.