Can you pick up the phone and spoke with some supervisor/boss at the Greenville,SC distribution center?
Unfortunately, I am just a carrier and cannot even have a meaningful dialog with my immediate supervision, much less get answers from Greenville, SC. Sorry. There could be many reasons why it didn't make it to you, but I cannot speculate what happened in this case. Could have been an error on the label caused it to be sent to a different town (zip code error) with the same street name, and maybe there was a sub on the route that day and didn't realize that the person (you) didn't live there. Maybe they were just too freaking stupid to realize they had a package for the wrong place.
The USPS is trying to transition to a low-pay, part-time, temporary workforce to save a buck instead of making cuts to the bloated management side of the business, and as a result service is suffering. For the most part, the new people we get are young (20's) and get NO benefits, NO guarantee of permanent employment, and NO days off. Yep, they are working them 7 days a week. Turnover is high, and they suck. Hell, this past Saturday I worked 10hrs47mins with no lunch and was only the 3rd carrier (out of about 40) finished with their route for the day.
Looks like the item made its way back to the sender and is now on its way to you again. Hopefully there won't be a repeat performance and it will get to you this time. Best of luck!!!