Possibly, but not definetely. A channel moderator only moderates a single channel, as an IRCop can affect the entire network.
I didn't have any problems with the network, but did notice that they do have an e-mail address for problems
Report abuse: email@example.com
Since you can't join any channels or change your nick, you might want to e-mail them asking if you were shunned and, if so, why.