Unhappy tenant after contractors were on site

My rental agency sent this business to conduct repairs to the flat we stay in and a personal item went missing during the time they were here. After they left and we realized the item was missing we checked every where it could be, and reached out to the contractors but they said they didn't have it either. Never had anything go missing before, so don't feel comfortable having them conduct business while we stay here ever again. I'm posting this so if anyone else ever has them do business on site to make sure the same thing doesn't happen to them. They also used my bucket with potting soil in as a trash can so learn from my mistake, do a thorough inventory before they start work and before they leave, and also do a quick walk through of where to find trash cans, or dispose of refuse.