Sadly I agree with most of what has already been said. If they want to start dumping your stuff outside there’s not much that can be done even if it isn’t right or fair. The police are only going to get involved if it turns nasty.
I had most of my clothes dumped outside in bin bags in the rain at one point!
I took all the personal belongings I couldn’t take with me and put them in the garage/ workshop, which I’d paid for and built at the top of garden. I’d written to her solicitors asking that she not enter but she still got a locksmith in and had the locks changed. I re-entered the garage and secured it again as I had a lot of machinery in there and not a place safe for the children to enter.
I had a toilet with separate access from the garage she even had that lock changed?
I wrote to her solicitor stating all the above but to no avail. I also pointed out she had a lock put on the former matrimonial bedroom I was respecting her privacy so didn’t believe it unreasonable to ask the same of her.
I know pay to keep my things in storage and have emptied the garage and left the doors banging in the wind!
Of course the locks to the house have now been changed but I wouldn’t go back in now anyway.