So, finally after mass attempts, finally got through to the character selection screen. Both last night and today when I've tried logging into my main, I've gotten the error codes of 2002, 10105, and 9002. I was reading a couple of posts and figured I'd try logging into an alt. Sure enough, I can log into a couple of my alts but not my main on Excalibur.

So I believe it's not exactly the ISP because if that were the case, I wouldn't have been able to get in the game at all. Please correct me if I'm wrong here.