Where to report a problem to the United States Postal Service?

I have a problem with the service i'm getting from my local Post Office, where can i report this problem (some higher level).

I searched on the USPS website, but i didnt find an email address for reporting problemsWhere to report a problem to the United States Postal Service?
Call and ask to speak to the Post Master. If they do not take action or give you an explanation ask them for contact information for the regional Post Master/Manager. If they won't give you information call the Post Office of a neighboring town and ask for the Post Master there. You don't have to tell them why you want the info but ask to speak to their superior and report your concern to them.

There is a huge bureaucracy in the Postal Service so there is a lot of red tape. But consequences for poor service can be high so take it as far as you can.

Good Luck.
at post officeWhere to report a problem to the United States Postal Service?
it depends whats your probelem.you can call 411 and ask for the number or address
Call 1-800-ASK-USPS

This will put you in touch with their central call center. They should be able to recommend a solution.Where to report a problem to the United States Postal Service?
The Postmaster General for your delivery area
Appear or send a certified letter to your Post Master in the city/town that you live. The Post Master will tackle the problem. Keep it at the local level at first, the higher up the ladder you go, the more chance your 'problem will not be addressed' do to the over load of complaints, suggestions, problems from many other areas. Good question and I hope my answer helps to resolve your issue with your USPS local Post Office. I am guessing you have already tried speaking with the Supervisor at your local Post Office and are following the chain of command for a resolution.
You can email the USPS via the "Contact us" link in the lower left corner of USPS.com