OK.
Go here:
http://pastebin.com/m24a64966
Copy it into notepad (don't worry the line numbers won't come through). Change the third line so it has your password instead of "abc123". The quote marks need to stay. Save the whole thing as massresign.html . Make sure notepad doesn't actually save it as massresign.html.txt .
Open the page in IE. (Firefox won't work, for two reasons which I won't bother to explain.) IE will say that it blocked the page for your security. Click on the yellow bar and choose "Allow Blocked Content", and click "yes" to the warning. (I tested this in IE 6, yours might have different warnings).
You should have an alertbox that say "250000". Click OK. Wait for the numbers to stop moving. Click the alertbox again. Repeat (30 times). Seriously, please wait for the numbers to stop each time before you click OK. I really mean it, please wait.
If the game exists, is in the proper range, and can be resigned by you, you should be resigned from it. Wait 72 hours and see if you get a new league game. If not, sorry, I can't think of anything else to do besides emailing AM.