Please oh please, someone kill Network Solutions

I've been trying to get my rumble.net domain off Network Solutions for the past three months. Eight support requests later and they still have it locked with lock status "REGISTRAR-LOCK".

Every time I submit a support request, the first response is "we can't do this by email, please phone". When I point out that I was logged into their site when I created the request, they then send their form letter that says "done" and promptly do nothing.

Now do you think there's a complaints procedure on their site? Course not!

So does anyone know where I can escalate this? I mean I'm not asking for anything complicated, just the ability to migrate to another (less crap) registrar. Ferfuxxake!