This happens to me everywhere. It happened when I lived in 98116 and now in 98136. USPS has complaint forms, you just need to ask for them. I would suggest getting a complaint form from a different post office than 98116 and returning to to the same post office you picked it up from. If you give it to the post office you are complaining about, it may get “lost”.
We keep getting a neighbor’s mail who lives a couple blocks away from us. I was really mad when they delivered their medication to us.