So i used the faction change on the points shop on my mage, it was succsesfull but i forgot to leave my former guild i was in while i was on the alliance, now even though it shows and says i'm not i a guild i can see what my former guild members are saying in their guild chat even though they are in the opposite faction. I cant write in the guild chat and when i tried /gquit it simply says I'm not in a guild.I dont know how can i stop seeing what they are writing to each other.
You have to get kicked from the guild or wait for server crash. If you join another guild before properly leaving that one then you will be automatically kicked from both guilds after server crash.