I have never seen such HORROR anywhere else!
If you can't just hand over a thing, then he can't accept it, then he can accept it.
The interest for the delay is cosmic. And even if you can't hand over your rented item because of him, please pay for this day of delay as well.
Court threats, shouting, fighting for every penny.
A tiny thief, with whom it is better not to have anything to do.