I hope that you already have put in a help request because that will be the fastest way to get your issue resolved.
One suggestion about the forums: when you post a question/problem here, try to include as much detailed information as possible. Include the how, what, when, where and whys of the situation. If you really describe your issue in depth, it makes it easier for people in the community to help you and you will get your answer much faster!
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .