You can use the customs number to track your package. Type it into the USPS.com site and it will tell you whether the package has been delivered. I just tracked one that went Air Parcel post to France this week.
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 .