Rick,
You don't have to call. If it isn't too late you can just email Jeff Barton at "staff@scoresheet.com" and tell him which team and league you want to purchase. Tell him you are a first time player so that he only charges you $29. He will email you a link to the league eventually and you can always pay for the league via the link which is on the website. I'm sure they will give you at least until the draft starts to pay. They are good people! As soon as you get an email back from him that he will set you up you should be able to go into the league and work it. At some point you will need to set up a username and password just like any other website. Once logged in you will see your name listed for that team and you will be good to go. If you ever have any questions about anything don't hesitate to shoot me an email. You can do that from the league web page by just clicking on the highlighted "2" under "Email The League". Good luck this season. I'm coming after your 101 win team!