You are not the only one, it tooks me weeks to get an account setup, I kept getting the same error message as you even after trying multiple good credit cards.

You are not the only one, it tooks me weeks to get an account setup, I kept getting the same error message as you even after trying multiple good credit cards. After contacting support several times, we were finally able to get me signed up by enrolling via the iOS developer app. It was a very painful, time wasting process!