You could try creating a servitor
A Servitor is essentially a servant that you create in order to do your bidding. It is a creature created on the astral plane that performs a certain task which you require.
A servitor could be used to:
I'm sure you could create one to scare away unwanted guest. Create your own personal poltergeist.
That'll get rid of them.
Good use of the broom as a tool for enchantments or hexes. I use my sweeping outside my house to not only rid blown plant debris, but negative projections from neighbors, coincidence in the amount of rentals and homes repeatedly for sale.
The original poster made the case in 2008 in Pres. Bush II reign and economic meltdown. How it all resolved of two unemployed guests, telling to read and aftermath.
Ideas of spells or signs of curses I've seen in many workplaces over the years.