Blasted for leaving a guild for no reason.

So this guild called * The rise of brutality* invited me last week and a half ago. No one really did anything together, or when I was on there was always like 8 members online 24/7. I'm looking for a bigger guild so I left. As soon I left the guild leader started freaking bashing and insulting me like crazy just for leaving. So I just blocked him he would not stop spamming me, I simply told him I need a bigger guild and he flipped at me.
Now since I left, when someone invites me to join a new guild, I click accept and it doesnt do anything the guild option stays grey. Help please!
Now since I left, when someone invites me to join a new guild, I click accept and it doesnt do anything the guild option stays grey. Help please!
