Postal Locations

My mail carrier has slammed my packages in my door so it would not latch. My door was almost ripped off the hinges and is damaged beyond repair. I have found my packages in the gutter by the road. I have a big sign on my door that says "please take all packages to the back door and they still throw them on the ground. I have asked them if I need to sign for a package to not deliver it. Just leave the pick up slip on my door and I will go get it instead of waiting. Yet they still leave the slips and force me to wait another day. The hand writing is so bad you can't read it. I have had nothing but issues. I am looking into moving because of this. Sending and receiving packages is a big part of my business and I can't afford to have these issues. This is why no one want to use USPS anymore.