You will get more satisfaction from banging your head against the wall, then complaining to the USPS. My guess is that you will only get more dissatisfied by complaining. Postal workers simply don't care. They don't make that much money, they just want to do what they have to and go home. They really don't care about customer service. They care about keeping their jobs and get through the day with the least amount of hassle. So don't go to the post office and think that you will get any kind of satisfaction.