You should complain.
In our last house, we had a postwoman who had some sort of vendetta against us, although she extended it to anybody who owned a dog.
It started when she left a parcel containing some electrical items sitting in the middle of the front path.
It was in full view of anybody who walked by. We were away for a few days, and it must have rained the entire time because we came home to disintegrated cardboard and ruined contents.
I complained about her. Not only was our parcel ruined, it was obvious to anybody that we were not at home during the time it was left on the path.
She then responded by taking normal post, letters and things, to a relative of DH's who lived nearby. No reason for this, they found it odd, we found it annoying.
She claimed she thought it would be safer with them if we were not in, even though it was stuff that would fit through the letterbox. She said that some things looked important, so she wanted to give them to somebody in person rather than leave them in the letterbox.
We asked her to stop leaving our letters and things with them but she wouldn't, every day she'd give our post to them instead of putting it through our door. Again, we complained about her because speaking to her hadn't helped and it was the only way to get our post delivered to our house.
Not long after that we had several days with no post whatsoever. Nothing was delivered to us.
And then a neighbour approached us and said the postwoman was claiming to have been bitten by our dog, and she had told them she wouldn't deliver anything else to us, we'd have to go to the office to collect it.
On the day in question, I was at home, nobody knocked, no post came through the door, the dog was locked in the house and the only way she would have been able to bite anybody was if they stuck their hand right through the letterbox (which had two flaps and those brushes on it) and waved their hand about inside while the very small dog jumped halfway up the door to grab them.
And since I was at home, I would have heard all that happening.
But that didn't happen, as the postwoman claimed she hadn't put her hand inside the letterbox even just a little bit. She said the dog had bitten her through it while her hand was outside.
There is no possible way that could have happened, unless the dog had learned to levitate and operate a letterbox, and extended her face through several inches of letterbox including the flaps and brushes, and bit someone who's hand was, in their own words, not near the door at all.
The postwoman could not explain to anybody how a dog managed to bite her through a locked door, when she was on one side, the dog was on the other, the dog couldn't possibly reach out through the letterbox, and she hadn't put her hand inside it.
She showed her injury to another neighbour, and they said wasn't a bite, it looked like she had cut her hand on something sharp, like a knife or a nail or something. It was a thin slice wound rather than puncture marks from teeth.
I believe she cut herself on something while out delivering and lied about it to get her own back for the previous complaints we had had to make about her. She apparently didn't seek any medical treatment so had nothing to say what might have caused the injury.
She then lied to the man who was covering her round while she was on holiday, and told him we had asked her not to deliver any of our post as we had security issues and wanted to collect it all from the sorting office. I spoke to him and he told me what she said. He was more than happy to bring all of our post but she had told him not to.
Talking to other people on the street, I found out she had refused to deliver to any houses where the people owned a dog.
I had to complain to the ombudsman about her, sending them proof of all the previous complaints we had had to make about her, to get our post delivered to our house again.
It took months to sort out, but they agreed with me because, based on her own testimony, it just wasn't possible for the dog to have reached her or bitten her. It just could not have happened at all.
Coupled with the previous complaints we had made, and statements from other neighbours that she was doing the same thing to them, she had to start re-delivering to our house. I think they should have sacked her.
But you have my sympathy OP, the inconvenience and hassle it causes is horrible, especially when you are home but have to wait hours to be able to collect your post, and make daily trips to get it.
DS was just a baby at the time and the post office collection area was up steps and through a narrow door. It was really inaccessible with the pram, but DH was away and I had nobody else to help me.
She made my life a nightmare for months, just out of petty spite because we'd had to complain about her before.