Two package delivery issues in a week

I am absolutely at my wits end with the USPS. In the past week alone they have messed up delivering 2 different packages. The first one was out for delivery on 6/17 was sorted wrong and sent back to a regional facility where it still sits today without any movement. The second one was supposed to be delivered today and is now saying I need to go to the post office and pick it up "per customer request" (nope, neither I nor the shipper requested this). Of course I cannot get ahold of anyone at the customer service line and am even disconnected when trying to speak to someone. This is so frustrating.