US Post Office

I live in the Edgewater Apartments and I have had all kinds of trouble with mail being delivered here. The Greensburg Bread of Life sent a receipt and it was returned to the sender. They had the correct address. My credit card was returned to the sender, they had the correct address. The check that I mailed to order my home appraisal was never delivered. I ordered an item on Amazon and that tracking showed that it was delivered to my address. I never got that item. I spoke with three different people at the Greensburg Post Office who said that they would return my call and they never did. I spoke to a manager and the post master and yet the problems persist. I continuously get others' mail. I cannot trust the employees of the USPS in Greensburg to handle my mail.