I haven't done anything illegal. I have to keep the boxes because my tenant does not want keep them in their living space.The tenant was instructed to tell them to contact me directly.
I just want to give them some trouble. Tomorrow morning, I will write an email to tell them to re-arrange pick-up. I need a longer notice.
But thanks for all the answers to keep me out of the emotional swing. These are very wealthy but very calculating people. BTW, they are Jewish.