Don't know if you have gotten activated yet - if not, you need to call that number and choose the option to speak to someone. I activated two new iPhone 6's Friday, and never could get either one of them activated through the automated process. Once I got someone on the phone to help me, they got it done quickly.
The hold times were kind of long, but that was Friday maybe they are better now - first one I did was around noonish when I got the phones, I was on hold about 25 min, the second one was Friday evening when my wife got home, I was on hold then about 45-50 min. It was painless once I got them on the phone though.