Q: I have "blocked" a phone number from calling me, but my phone is still ringing. How do I block the number so that it doesn't even ring through?

You can block phone calls and messages, individually. Maybe you just have blocked it in one place. Check this support document for more information regarding blocking. http://support.apple.com/kb/HT5845

Okay, you are correct the call is not supposed to ring in. Have you done any troubleshooting on the phone? First off, try power cycling the phone. Turn the phone off, then back on again. If that does not work, then try a reset. Hold the sleep/wake and home buttons together until you see the Apple logo and then release. The phone will reboot. See if that changes things. Is the caller using the exact number that you blocked, or is it possible they are using another number, or have restricted the Caller ID?

I am having the same problem. Did you ever figure out how to resolve this issue?