How do I check my paid account status / expiration date?

I stopped getting email on Sunday, and I'm trying to track down the problem.

I'm wondering if spamcop is not giving me anything when I POP, and not 
showing anything in the webmail inbox either, even though it is still 
putting spam into the held mail box.

I tried to check my "paid up" status, but can't find any account status 
or information on the web site anywhere!  How do I check on this?

--John